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

packages/ui/src/lib/api/types.ts

@@ -1,12 +1,14 @@
 import type { WorktreeMetadata } from '@/types/worktree';
 
-export type RuntimePlatform = 'web' | 'desktop';
+export type RuntimePlatform = 'web' | 'desktop' | 'vscode';
 
 export interface RuntimeDescriptor {
   platform: RuntimePlatform;
 
   isDesktop: boolean;
 
+  isVSCode: boolean;
+
   label?: string;
 }
 
@@ -386,6 +388,11 @@ export interface ToolsAPI {
   getAvailableTools(): Promise<string[]>;
 }
 
+export interface EditorAPI {
+  openFile(path: string, line?: number, column?: number): Promise<void>;
+  openDiff(original: string, modified: string, label?: string): Promise<void>;
+}
+
 export interface RuntimeAPIs {
   runtime: RuntimeDescriptor;
   terminal: TerminalAPI;
@@ -396,6 +403,7 @@ export interface RuntimeAPIs {
   notifications: NotificationsAPI;
   diagnostics?: DiagnosticsAPI;
   tools: ToolsAPI;
+  editor?: EditorAPI;
 
   worktrees?: WorktreeMetadata[];
 }