Split Player properties into individual types that are dynamically serialized

[Measurity]

Changes

• Dynamic serialization of player properties based on IPlayerProperty and IConnectedPlayerProperty.
• Player properties will now fallback to a default value if missing in PlayerData.json.
• Player properties that have default values will not persist to save space and make PlayerData.json easier to read.
• Player properties are now part of the DI framework and scoped together. See VisibleCellsProperty for example.
• System.Text.Json used in PlayerService for performance / future-proofing reasons.
• PlayerData.json will be migrated to a new format automatically, with full backward compatibility thanks to ListLikeNewtonsoftJsonConverter and DictionaryLikeNewtonsoftJsonConverter converters.
• Made player properties thread-safe. Necessary in some cases when accessed by both services and packet processing.
• Removed Player.cs. Code that used it for player references now uses SessionId and PlayerService.GetProperty<TProp>(sessionId) API.

TODO

• Test loading a large save.
• Verify intro cinematic works same as on master.
• Fix bug: Spawn rotation incorrect. Not caused by this PR. Spawn rotation when inside a base is wrongly interpreted as opposite facing #2895
• Serialize list / dictionary like NewtonsoftJSON did for backward-compat.
• Handle TODOs in code.

[github-actions]

Test Results

  1 files   -   1    1 suites   - 1   10s ⏱️ -15s
275 tests +  6  270 ✅ +  6  5 💤 ±0  0 ❌ ±0 
275 runs   - 263  270 ✅  - 258  5 💤  - 5  0 ❌ ±0 

Results for commit 376414f. ± Comparison against base commit 7815b4e.

♻️ This comment has been updated with latest results.