Autofill for JSDocs (#20625)

* Add autofill for JSDocs

Adds prototype of autofill for jsdoc comments. For code like:

```js
    /**|
    function mul(x, y) {
        return x * y;
    }
```

When you press return, we will complete it to:

```js
    /**
     *
     * @param x
     * @param y
     */
    function mul(x, y) {
        return x * y;
    }
```

In Typescript and to:

```js
    /**
     *
     * @param {any} x
     * @param {any} y
     */
    function mul(x, y) {
        return x + y;
    }
```

In JavaScript

* Handle revert case better

* Disable on enter when suggestion is visible

extensions/typescript/package.json

@@ -36,6 +36,7 @@
     "onCommand:typescript.selectTypeScriptVersion",
     "onCommand:javascript.goToProjectConfig",
     "onCommand:typescript.goToProjectConfig",
+    "onCommand:_typescript.tryCompleteJsDoc",
     "workspaceContains:jsconfig.json",
     "workspaceContains:tsconfig.json"
   ],
@@ -83,6 +84,18 @@
         }
       }
     ],
+    "keybindings": [
+      {
+        "key": "enter",
+        "command": "_typescript.tryCompleteJsDoc",
+        "when": "editorTextFocus && !suggestWidgetVisible && editorLangId == 'typescript'"
+      },
+         {
+        "key": "enter",
+        "command": "_typescript.tryCompleteJsDoc",
+        "when": "editorTextFocus && !suggestWidgetVisible && editorLangId == 'javascript'"
+      }
+    ],
     "configuration": {
       "type": "object",
       "title": "%configuration.typescript%",
@@ -279,7 +292,7 @@
         "title": "%typescript.goToProjectConfig.title%",
         "category": "TypeScript"
       },
-       {
+      {
         "command": "javascript.goToProjectConfig",
         "title": "%javascript.goToProjectConfig.title%",
         "category": "JavaScript"