Add the displayName Property to Project Template Parameters (#40105)

# Add the `displayName` Property to Project Template Parameters

Improves display of project template parameters by providing an easily readable parameter name.

Currently:
![image](https://user-images.githubusercontent.com/14852843/153301454-dfb5f44b-00b6-45d5-90aa-e8656cc97036.png)

After:
![image](https://user-images.githubusercontent.com/14852843/153320880-e897986c-b5fc-4a4b-b9df-28e93e7a3c16.png)

## Description

Recent changes which enabled template localization (#38867) omitted the new `displayName` property, which led to VS using the parameter id/name instead. This is non-localized and comes in the form of `camelCase`, `UpperCamelCase` or `kebab-case`.

Fixes https://github.com/aspnet/AspNetCore-ManualTests/issues/1154

## Customer Impact

The property id/name is being used instead of a more legible property display name. This can manifest itself in `camelCase`, `UpperCamelCase` or `kebab-case` case like below:

![image](https://user-images.githubusercontent.com/14852843/153301454-dfb5f44b-00b6-45d5-90aa-e8656cc97036.png)

## Regression?

- [x] Yes
- [ ] No

Visual Studio 17 Preview 1.

## Risk

- [ ] High
- [x] Medium
- [ ] Low


## Verification

- [x] Manual (required)
- [ ] Automated

## Packaging changes reviewed?

- [ ] Yes
- [ ] No
- [x] N/A

Author: TanayParikh

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.cs.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.de.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.en.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.es.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.fr.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.it.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.ja.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.ko.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.pl.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }

src/ProjectTemplates/Web.ItemTemplates/content/RazorPage/.template.config/localize/templatestrings.pt-BR.json

@@ -4,5 +4,6 @@
   "description": "A Razor page with or without a page model",
   "symbols/namespace/description": "namespace for the generated code",
   "symbols/no-pagemodel/description": "create page without a PageModel",
+  "symbols/no-pagemodel/displayName": "Exclude PageModel",
   "postActions/openInEditor/description": "Opens Index.cshtml in the editor"
 }