refactor: Refactor json loading mechanism & more

- Move json loading into separate crate `common`
- Add new http route for handling SRTools API
- Listen to `freesr-data.json` file change, and sync with client immediately
- Move json loading into `PlayerSession`, instead of load it everytime
- Implement global buff for Castorice
- Implement `GetBigDataAllRecommendCsReq`

.gitignore

@@ -1,3 +1,6 @@
 target/
 Cargo.lock
 proto/StarRail.proto
+/prebuild
+/assets
+.vscode