feat: vscode extension (#59)

* feat: add initial VS Code extension plan and implementation tasks

* feat(vscode): added initial version of an Openchamber VSCode extension

* feat(vscode): enhance VS Code extension with theme integration and session management

* feat(vscode): implement connection status handling and overlay in VSCode layout

* feat: move extension to secondary sidebar

* chore: upgrade @opencode-ai/sdk to 1.0.150

* vscode: editor bridge, file picker, click-to-open in tool parts

* vscode: layout session lifecycle, theme sync, typography overrides

* ui: compact mode for vscode, model search, autocomplete width fixes

* perf: scroll force flag, raf placeholder, git polling backoff

* ui: tool output styling, markdown code block fix, gitignore

* refactor: update typography handling for VSCode runtime, remove unused styles

* docs: update README with VS Code extension details and add extension image

* docs: update changelog with new features and performance improvements

README.md

@@ -16,6 +16,7 @@ The whole project was built entirely with AI coding agents under my supervision.
 ![Tool Output](docs/references/tool_output_example.png)
 ![Settings](docs/references/settings_example.png)
 ![Web Version](docs/references/web_version_example.png)
+![VS Code Extension](docs/references/vscode_extension.png)
 <p>
 <img src="docs/references/pwa_chat_example.png" width="45%" alt="PWA Chat">
 <img src="docs/references/pwa_terminal_example.png" width="45%" alt="PWA Terminal">
@@ -45,6 +46,10 @@ The whole project was built entirely with AI coding agents under my supervision.
 
 ## Installation
 
+### VS Code Extension
+
+Install from [VS Code Marketplace](https://marketplace.visualstudio.com/items?itemName=fedaykindev.openchamber) or search "OpenChamber" in Extensions.
+
 ### CLI (Web Server)
 
 ```bash