fleetdm.com/tables: vscode_extensions (#16779)

- Add override file
- Add description
- Add example query
- Add note: Querying for VS Code extensions requires joining against the
`users` table.
- Add columns

schema/tables/vscode_extensions.yml

@@ -0,0 +1,47 @@
+name: vscode_extensions
+description: Installed extensions for [Visual Studio (VS) Code](https://code.visualstudio.com/). 
+examples: >-
+  List the name, publisher, and version of the Visual Studio (VS) Code extensions installed on hosts.
+  ```
+
+  SELECT extension.name, extension.publisher, extension.version FROM users JOIN vscode_extensions extension USING (uid);
+
+  ```
+notes: Querying this table requires joining against the `users` table.
+columns:
+- name: name
+  description: Extension Name
+  type: text
+  required: false
+- name: uuid
+  description: Extension UUID
+  type: text
+  required: false
+- name: version
+  description: Extension version
+  type: text
+  required: false
+- name: path
+  description: Extension path
+  type: text
+  required: false
+- name: publisher
+  description: Publisher Name
+  type: text
+  required: false
+- name: publisher_id
+  description: Publisher ID
+  type: text
+  required: false
+- name: installed_at
+  description: Installed Timestamp
+  type: bigint
+  required: false
+- name: prerelease
+  description: Pre release version
+  type: integer
+  required: false
+- name: uid
+  description: The local user that owns the plugin
+  type: bigint
+  required: false