feat(tools): add Google Docs, Drive, and Tasks read-only tools

Add three new Google service integrations following the established
Gmail/GCal pattern:

- Google Docs (docs.list, docs.search, docs.read): list, search, and
  read document content as plain text via Docs + Drive APIs
- Google Drive (drive.list, drive.search, drive.read): list, search,
  and read files with export support for Workspace files (Docs→text,
  Sheets→CSV, Slides→text)
- Google Tasks (tasks.lists, tasks.list): list task lists and tasks
  with status, due dates, and notes

Each service has its own config section, OAuth auth command, tool
policy group, and test suite (53 new tests). The setup wizard now
offers to configure all Google services together and run OAuth auth
flows automatically after saving config.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/tools/policy.ts

@@ -26,6 +26,14 @@ const PROFILE_TOOLS: Record<ToolProfile, Set<string>> = {
     'calendar.today',
     'calendar.list',
     'calendar.search',
+    'docs.list',
+    'docs.search',
+    'docs.read',
+    'drive.list',
+    'drive.search',
+    'drive.read',
+    'tasks.lists',
+    'tasks.list',
   ]),
   coding: new Set([
     'file.read',
@@ -42,6 +50,14 @@ const PROFILE_TOOLS: Record<ToolProfile, Set<string>> = {
     'calendar.today',
     'calendar.list',
     'calendar.search',
+    'docs.list',
+    'docs.search',
+    'docs.read',
+    'drive.list',
+    'drive.search',
+    'drive.read',
+    'tasks.lists',
+    'tasks.list',
     'file.write',
     'file.edit',
     'file.patch',
@@ -71,6 +87,9 @@ export const TOOL_GROUPS: Record<string, string[]> = {
   'group:memory': ['memory.read', 'memory.write', 'memory.search'],
   'group:gmail': ['gmail.list', 'gmail.search', 'gmail.read'],
   'group:gcal': ['calendar.today', 'calendar.list', 'calendar.search'],
+  'group:gdocs': ['docs.list', 'docs.search', 'docs.read'],
+  'group:gdrive': ['drive.list', 'drive.search', 'drive.read'],
+  'group:gtasks': ['tasks.lists', 'tasks.list'],
 };
 
 /** Expand group references in a list of tool names/patterns. */