docs: catch up wiki with 10 undocumented modules + today's mod/welcome changes
This wiki (dev.sven-neurath.de/darksoon/GrumpyCore_wiki/wiki) hadn't
been touched since May 13 — a completely different, correctly-linked
repo (GrumpyCore_wiki.git main branch, not the wiki) was mistakenly
maintained instead in earlier sessions.
New pages (DE+EN each): Reminders, Birthdays, RSS, Giveaways,
Serverstats, Announcements, Events, Settings, YouTube, Twitch, and the
brand-new Triggers module ("tags") with a full step-by-step example.
Rewrote GrumpyMod/-EN and GrumpyWelcome/-EN from scratch — the existing
versions had drifted from the actual schema (wrong field names, a
non-existent antiNuke YAML block, stale report cooldown values) on top
of being incomplete. Now covers URLhaus, message-log, /mod nuke, boost
announcements, and sticky roles accurately against the current code.
Home.md and _Sidebar.md updated with the new navigation entries.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>