Add grammar development extension for VSCode

Author: fwcd

.vscode/launch.json

@@ -30,6 +30,14 @@
             "request": "attach",
             "hostName": "localhost",
             "port": 5005
+        },
+        {
+            "type": "extensionHost",
+            "name": "Run Grammar Dev Extension",
+            "request": "launch",
+            "args": [
+                "--extensionDevelopmentPath=${workspaceFolder}/grammars/vscode-grammar-dev"
+            ]
         }
     ]
 }

grammars/vscode-grammar-dev/.vscodeignore

@@ -0,0 +1,4 @@
+.vscode/**
+.vscode-test/**
+.gitignore
+vsc-extension-quickstart.md

grammars/vscode-grammar-dev/README.md

@@ -0,0 +1,11 @@
+# Grammar Development Extension for VSCode
+
+A small VSCode extension for development of the Kotlin grammar.
+
+> Note: The actual Kotlin support for VSCode, including the language client, is located in the [`vscode-kotlin` repository](https://github.com/fwcd/vscode-kotlin).
+
+## Usage
+
+The most convenient way to run the extension is to simply use the debug configuration `Run Grammar Dev` in this repo.
+
+> Note: VSCode might show a warning that grammar paths are located outside of the extension folder. This message can be ignored, since the extension is only indended for development anyway.

grammars/vscode-grammar-dev/package.json

@@ -0,0 +1,25 @@
+{
+    "name": "kotlin-grammar-dev",
+    "displayName": "Kotlin Grammar Development",
+    "description": "Grammar development extension for Kotlin",
+    "version": "0.0.1",
+    "engines": {
+        "vscode": "^1.67.0"
+    },
+    "categories": [
+        "Programming Languages"
+    ],
+    "contributes": {
+        "languages": [{
+            "id": "kotlin",
+            "aliases": ["Kotlin", "kotlin"],
+            "extensions": [".kt",".kts"],
+            "configuration": "../kotlin.configuration.json"
+        }],
+        "grammars": [{
+            "language": "kotlin",
+            "scopeName": "source.kotlin",
+            "path": "../Kotlin.tmLanguage.json"
+        }]
+    }
+}