README + reduce required VS Code version for companion extension (#5719)

packages/vscode-ide-companion/package.json

@@ -11,7 +11,7 @@
     "directory": "packages/vscode-ide-companion"
   },
   "engines": {
-    "vscode": "^1.101.0"
+    "vscode": "^1.99.0"
   },
   "license": "LICENSE",
   "preview": true,
@@ -113,7 +113,7 @@
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.3",
     "@types/node": "20.x",
-    "@types/vscode": "^1.101.0",
+    "@types/vscode": "^1.99.0",
     "@typescript-eslint/eslint-plugin": "^8.31.1",
     "@typescript-eslint/parser": "^8.31.1",
     "esbuild": "^0.25.3",