refactor: extract lib.rs, remove club module, add bounded concurrency

- Extract shared types (Car, BestCarRecord, AnalysisContext) into src/lib.rs
- Replace global static BEST_CARS with injected AnalysisContext for testability
- Add semaphore-bounded concurrency (limit 20) in parse_all_times()
- Replace hardcoded track name match with track_names.json loaded via include_str!
- Replace magic number 115 with const MAX_RQ: u8 = 113
- Improve floating-point tie comparison with TIME_TOLERANCE (5ms) constant
- Remove src/club.rs binary (topdrives.club no longer maintained)
- Remove scraper dependency from Cargo.toml
- Remove tracks.txt (replaced by track_names.json)
- Remove empty/placeholder test bodies
- Improve error handling in get_file() for response body read
- Add load_my_cars_data() combining owned + wishlist extraction in one I/O
- Update CHANGELOG, README, and all docs to reflect changes

Cargo.toml

@@ -3,16 +3,15 @@ name = "top_drives"
 version = "0.2.0"
 edition = "2021"
 
-[[bin]]
-name = "club"
-path = "src/club.rs"
+[lib]
+name = "top_drives"
+path = "src/lib.rs"
 
 [[bin]]
 name = "records"
 path = "src/records.rs"
 
 [dependencies]
-scraper = "0.23.1"
 reqwest = "0.12.15"
 tokio = { version = "1.44.1", features = ["full"] }
 serde_json = "1.0.140"