[vs-code-extension] add basic snippets for typespec (microsoft#4737)

- add snippets for typespec basic constructs
- package snippets within vs code extension

part of microsoft#4559

.chronus/changes/vs-code-extension-typespec-snippets-2024-9-15-11-2-20.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - typespec-vscode
+---
+
+Add basic snippets for typespec

packages/typespec-vscode/.vscodeignore

@@ -17,3 +17,4 @@ dist/test/
 !ThirdPartyNotices.txt
 !LICENSE
 !icons/
+!snippets.json

packages/typespec-vscode/package.json

@@ -20,7 +20,8 @@
   "publisher": "typespec",
   "displayName": "TypeSpec for VS Code",
   "categories": [
-    "Programming Languages"
+    "Programming Languages",
+    "Snippets"
   ],
   "type": "module",
   "main": "./dist/src/extension.cjs",
@@ -141,6 +142,12 @@
           }
         }
       }
+    ],
+    "snippets": [
+      {
+        "language": "typespec",
+        "path": "./snippets.json"
+      }
     ]
   },
   "scripts": {

packages/typespec-vscode/snippets.json

@@ -0,0 +1,32 @@
+{
+  "Enum": {
+    "prefix": "enum",
+    "body": "enum ${1:Name} {\n  ${0:value},\n}",
+    "description": "Enum definition"
+  },
+  "Interface": {
+    "prefix": "interface",
+    "body": "interface ${1:Name} {\n  ${2:member}(${3:parameters}:${4:type}): ${0:returnType};\n}",
+    "description": "Interface definition"
+  },
+  "Model": {
+    "prefix": "model",
+    "body": "model ${1:Name} {\n  ${2:propertyName}: ${0:propertyType};\n}",
+    "description": "Model definition"
+  },
+  "Namespace": {
+    "prefix": "namespace",
+    "body": "namespace ${1:Name} {\n  $TM_SELECTED_TEXT$0\n}",
+    "description": "Namespace definition"
+  },
+  "Operation": {
+    "prefix": ["op", "operation"],
+    "body": "op ${1:name}(${2:parameters}:${3:type}): ${0:returnType};",
+    "description": "Operation definition"
+  },
+  "Union": {
+    "prefix": "union",
+    "body": "union ${1:Name} = ${2:variant1} | ${0:variant2};",
+    "description": "Named union definition"
+  }
+}