Document theflarum/audit extension (1.x)

[imorland]

Adds documentation for the first-party flarum/audit extension, in the 1.x version (versioned_docs/version-1.x).

The page covers:

• Requirements (JSON column / MySQL 5.7.8+ / MariaDB 10.2.7+), installation, and the upgrade path from the KILOWHAT audit extensions (composer replace and the in-place kilowhat_audit_log → audit_log table rename).
• The flarum-audit.view and flarum-audit.viewLimited permissions and the limited-access settings.
• Browsing the log, the search gambits (action, actor, user, client, discussion, ip) with comma/negation syntax, filter chips and autocomplete.
• The optional IP country indicator via fof/geoip.
• Anatomy of an entry, including the queued-job IP/actor caveat.
• Removing data with audit:clear --reset / --before.
• The full list of logged actions across core and the bundled first-party integrations.
• A note that the third-party integrations (FoF, ClarkWinkelmann) are currently bundled but intended to move into those extensions via the public extender API.
• A developer section for the public Flarum\Audit\Extend\Audit extender.

Registers the page in the 1.x guide sidebar under Management.

Documents the extension added in flarum/framework#4704.