feat: add GitHub issue picker and API endpoints

Add GitHubIssuePickerDialog UI for selecting issues
Enable new session from GitHub issue from session sidebar
Implement GitHub issues/list/get/comments APIs across desktop, web, and VS Code

packages/desktop/src-tauri/src/main.rs

@@ -46,6 +46,7 @@ use commands::logs::fetch_desktop_logs;
 
 use commands::github::{
     github_auth_complete, github_auth_disconnect, github_auth_start, github_auth_status, github_me,
+    github_issue_comments, github_issue_get, github_issues_list,
     github_pr_create, github_pr_merge, github_pr_ready, github_pr_status,
 };
 use commands::notifications::desktop_notify;
@@ -906,6 +907,9 @@ fn main() {
             github_pr_create,
             github_pr_merge,
             github_pr_ready,
+            github_issues_list,
+            github_issue_get,
+            github_issue_comments,
         ])
         .on_menu_event(|app, event| {
             #[cfg(target_os = "macos")]