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`

gameserver/src/net/handlers/avatar.rs

@@ -1,20 +1,21 @@
-use crate::net::tools::FreesrData;
-
 use super::*;
 
-static UNLOCKED_AVATARS: [u32; 63] = [
+pub static UNLOCKED_AVATARS: [u32; 63] = [
     1002, 1003, 1004, 1005, 1006, 1008, 1009, 1013, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108,
     1109, 1110, 1111, 1112, 1201, 1202, 1203, 1204, 1205, 1206, 1207, 1208, 1209, 1210, 1211, 1212,
     1213, 1214, 1215, 1217, 1301, 1302, 1303, 1304, 1305, 1306, 1307, 1308, 1309, 1312, 1315, 1310,
-    1314, 1218, 1221, 1220, 1222, 1223, 1317, 1313, 1225, 1402, 1401, 1404, 1403, 1405, 1407
+    1314, 1218, 1221, 1220, 1222, 1223, 1317, 1313, 1225, 1402, 1401, 1404, 1403, 1405, 1407,
 ];
 
 pub async fn on_get_avatar_data_cs_req(
-    _session: &mut PlayerSession,
+    session: &mut PlayerSession,
     body: &GetAvatarDataCsReq,
     res: &mut GetAvatarDataScRsp,
 ) {
-    let json = FreesrData::load().await;
+    let Some(json) = session.json_data.get() else {
+        tracing::error!("data is not set!");
+        return;
+    };
 
     // TODO: HARDCODED
     let mc_ids = if json.main_character.get_gender() == Gender::Man {