feat: convert file manager into a plugin

src/ui/plugin-host/shell-bridge.ts

@@ -89,8 +89,6 @@ export const shell: TabShellCallbacks = {
   openSingletonTab: (...args) => callbacks?.openSingletonTab(...args),
   closeTab: (...args) => callbacks?.closeTab(...args),
   renameTab: (...args) => callbacks?.renameTab(...args),
-  openFileInEditor: (...args) => callbacks?.openFileInEditor(...args),
-  openFileManager: (...args) => callbacks?.openFileManager(...args),
   openTerminalTab: (...args) => callbacks?.openTerminalTab(...args),
   openRailView: (...args) => callbacks?.openRailView(...args),
   closeRailView: (...args) => callbacks?.closeRailView(...args),

src/ui/plugin-host/testing-host.tsx

@@ -68,8 +68,6 @@ function recordingShell(calls: ShellCall[]): TabShellCallbacks {
     openSingletonTab: record("openSingletonTab"),
     closeTab: record("closeTab"),
     renameTab: record("renameTab"),
-    openFileInEditor: record("openFileInEditor"),
-    openFileManager: record("openFileManager"),
     openTerminalTab: record("openTerminalTab"),
     openRailView: record("openRailView"),
     closeRailView: record("closeRailView"),