Add 28 new tests across 4 test files for Taplo TOML language support:
- test_toml_edge_cases.py: Tests for inline tables, multiline strings,
arrays of tables, nested tables, datetime values, and dependency tables
- test_toml_ignored_dirs.py: Tests for TOML-specific directory ignoring
(target, .cargo, node_modules)
- test_toml_symbol_retrieval.py: Tests for document overview, symbol tree,
directory overview, and symbol hierarchy operations
- __init__.py: Package initialization
Also adds config.toml test fixture with comprehensive TOML features for
edge case testing.
Total: 35 TOML tests (7 basic + 28 new), all passing.
