shifting WASI to platform

Author: heckj

_info-architecture/0003-swift-docs-proposal.md

@@ -79,32 +79,40 @@ but don't reflect all the possible future content we might create.
   - API guidelines - moderated/reviewed by the Language Steering Group.
   - Server guides - moderated/reviewed by the SSWG.
   - Ecosystem Tools Guides - moderated/reviewed by ecosystem steering group.
-  - WASM - moderated/reviewed by ecosystem steering group.
+  - Platform Guides - moderated/reviewed by platform steering group.
 
 An example `tree` view of such a repository:
 
 ```
-├── api-guidelines
-│   └── APIGuidelines.docc
-│       ├── DocComment.md
-│       ├── Documentation.md
-│       ├── include-words-to-avoid-ambiguity.md
-│       ├── name-according-to-roles.md
-│       ├── omit-needless-words.md
-│       └── weak-type-information.md
 ├── CODEOWNERS
+├── common
+│   ├── footer.html
+│   ├── header.html
+│   ├── README
+│   └── theme-settings.json
 ├── ecosystem
 │   ├── EcosystemTools.docc
 │   │   ├── Documentation.md
 │   │   ├── getting-started-with-vscode-swift.md
 │   │   ├── zero-to-swift-emacs.md
 │   │   └── zero-to-swift-nvim.md
-│   └── WASM.docc
+├── platform
+│   └── PlatformGuides.docc
 │       └── Documentation.md
 ├── README.md
-└── server-guides
-    └── ServerGuides.docc
-        └── Documentation.md
+├── server
+│   └── ServerGuides.docc
+│       ├── building.md
+│       ├── Documentation.md
+│       └── testing.md
+├── swift
+│   └── APIGuidelines.docc
+│       ├── DocComment.md
+│       ├── Documentation.md
+│       ├── include-words-to-avoid-ambiguity.md
+│       ├── name-according-to-roles.md
+│       ├── omit-needless-words.md
+│       └── weak-type-information.md
 ```
 
 The directories for each catalog residing at the root can host another DocC catalog (a directory ending with .docc), to host the markdown content in a typical DocC fashion.
@@ -120,9 +128,10 @@ From a mechanical perspective, reviewers are listed in a `CODEOWNERS` file, whic
 For example, the structure of the catalogs above might line up to:
 
 ```
-/api-guidelines/* @swiftlang/language-steering-group
+/swift/* @swiftlang/language-steering-group
 /ecosystem/* @swiftlang/ecosystem-steering-group
 /server-guides/* @swiftlang/server-workgroup
+/platform/* @swifting/platform-steering-group
 ```
 
 If a group dissolves, any catalogs can be associated with another group, or revert to control by the Swift Core Team.