feat[bindings]: expose power level thresholds in corresponding timeline event

[JoFrost]

Hello! This PR exposes power-level thresholds in OtherState::RoomPowerLevels for the FFI timeline.

It includes action requirements such as ban, kick, invite, redact, state_default, events_default, per-event overrides and notifications. This gives FFI clients direct access to the effective power levels of a room, which were previously unavailable.

• Public API changes documented in changelogs (optional)

Signed-off-by:

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.51%. Comparing base (238e4e8) to head (4653005).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5931   +/-   ##
=======================================
  Coverage   88.50%   88.51%           
=======================================
  Files         362      362           
  Lines      103291   103291           
  Branches   103291   103291           
=======================================
+ Hits        91413    91423   +10     
+ Misses       7535     7527    -8     
+ Partials     4343     4341    -2     

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[codspeed-hq]

CodSpeed Performance Report

Merging #5931 will not alter performance

_{Comparing JoFrost:main (4653005) with main (238e4e8)}

Summary

✅ 50 untouched