Adds --from flag to gmail send and gmail reply commands, allowing agents
to customize the From header display name when sharing the same email
account. Usage: --from '"Agent Name" <user@example.com>'
Also syncs repo google_api.py with the deployed standalone implementation
(replaces outdated gws_bridge thin wrapper), adds dedicated docs page
under Features > Skills, and updates sidebar navigation.
Requested by community user @Maxime44.
