feat: add docs comments subcommand for managing Google Doc comments (#263)

* feat: add `docs comments` subcommand for managing Google Doc comments

Add a full `gog docs comments` command tree that provides a
doc-centric interface for managing comments on Google Docs via
the Drive API v3 comments endpoint.

Subcommands:
  list    - List comments (filters resolved by default, --include-resolved to show all)
  get     - Get a single comment with full details including replies
  add     - Add a comment, optionally anchored to quoted text
  reply   - Reply to a comment
  resolve - Resolve a comment (mark as done), with optional message
  delete  - Delete a comment

Key differences from `drive comments`:
- `list` filters resolved comments by default (--include-resolved to include)
- `list` always shows quoted text column (no separate flag needed)
- `resolve` subcommand (drive comments has no equivalent)
- Accepts Google Doc URLs in addition to bare IDs (via normalizeGoogleID)
- Doc-centric naming and help text

Follows existing patterns: uses shared helpers (collectAllPages,
tableWriter, formatDateTime, truncateString, normalizeGoogleID,
failEmptyExit, dryRunExit, confirmDestructive), same auth/token
flow, consistent output formatting.

* fix: improve docs comments list and anchoring (#263) (thanks @alextnetto)

---------

Co-authored-by: Peter Steinberger <steipete@gmail.com>

Author: alextnetto

CHANGELOG.md

@@ -9,6 +9,7 @@
 - Drive: add `drive ls|search --no-all-drives` to restrict queries to "My Drive" for faster/narrower results. (#258)
 - Gmail: add `gmail send --quote` to include quoted original message in replies. (#169) — thanks @terry-li-hm.
 - Sheets: add `sheets notes` to read cell notes. (#208) — thanks @andybergon.
+- Docs: add `docs comments` for listing and managing Google Doc comments. (#263) — thanks @alextnetto.
 
 ### Fixed
 - Auth: manual OAuth flow uses an ephemeral loopback redirect port (avoids unsafe/privileged ports in browsers). (#172) — thanks @spookyuser.

internal/cmd/docs.go

@@ -27,6 +27,7 @@ type DocsCmd struct {
 	Create      DocsCreateCmd      `cmd:"" name:"create" aliases:"add,new" help:"Create a Google Doc"`
 	Copy        DocsCopyCmd        `cmd:"" name:"copy" aliases:"cp,duplicate" help:"Copy a Google Doc"`
 	Cat         DocsCatCmd         `cmd:"" name:"cat" aliases:"text,read" help:"Print a Google Doc as plain text"`
+	Comments    DocsCommentsCmd    `cmd:"" name:"comments" help:"Manage comments on a Google Doc"`
 	ListTabs    DocsListTabsCmd    `cmd:"" name:"list-tabs" help:"List all tabs in a Google Doc"`
 	Write       DocsWriteCmd       `cmd:"" name:"write" help:"Write content to a Google Doc"`
 	Insert      DocsInsertCmd      `cmd:"" name:"insert" help:"Insert text at a specific position"`