Release 0.6.9

• test: migrate from Mocha/NYC to Vitest b2363de
• updated docs 2557033
• chore: remove unused mocha/nyc deps; add vitest keyword 813c8fb
• chore(eslint): migrate to flat TS config (eslint.config.ts) 1d3cfff
• chore(eslint): run typed rules on all TS files incl. tests 484f8b1
• types(tsd): adopt tsd for type testing; ignore rollup TS defaulting warning 3529372
• updated vitest 7def520
• types/lint: fix rollup types and exclude cache/tsd tests from ESLint c9f6695
• types: fix remaining TS errors after widening tsconfig include d5dfe11
• test/knip/stan: add Vitest type tests; fix knip and build warn filter f7f55a0
• chore(eslint): integrate Vitest ESLint plugin ffee602
• docs: expand README with exports and examples; fix conditionalize export dc699fb
• fix(lint,typecheck): allow chai chainers; run tsd correctly 1a3ed22
• docs update 3500148
• fix(types+tsd): stabilize MutuallyExclusive and adjust tests f45f82d
• test/build: stabilize Vitest migration; fix rollup & TS 563413a
• test(types): refactor MutuallyExclusive tests to compile-time asserts 3cf33fe
• chore(types): remove Chai types; move type-only test out of Vitest 4c52341
• chore(eslint): scope typed rules to src; disable for tests 241ed95
• fix(tsd): add default test-d harness to discover type tests 448b3b6
• build(rollup): make TS config JS-compatible per template f1ec2e4
• build(rollup): remove JSON import assertion; fix DTS plugins array 92b223c
• fix(typecheck): run tsd on tests/types f35886e
• chore(eslint): exclude tests from typed rules; remove disableTypeChecked 84878f6
• docs(todo): remove resolved build item; confirm TS Rollup config d31b50a
• added google drive sync 290d544
• build(stan): warnPattern now ignores plugin defaulting notice, keeps other warnings 1d648b0
• build(rollup): apply TS plugin to rollup.config.ts 832b439
• build(rollup): compile TS config via @rollup/plugin-typescript e6bdb3a
• chore(knip): ignore tsd type-test files c0a0120