This PR expands the `tomlmojo` module toward “core TOML v1.0” support by
extending tokenization/parsing for additional TOML constructs, and adds
documentation plus a dedicated test runner and feature tests.

**Changes:**
- Extend TOML tokenizer/parser to support inline tables, dotted/quoted
keys, multiline strings/arrays, unicode escapes, integer bases, and
duplicate-key detection.
- Add a new TOMLMojo documentation page and a comprehensive feature test
suite + test runner task/script.
- Update benchmark entrypoints to increase Python’s `int` string digit
limit and load bench iteration counts from TOML config for several
BigInt benches.