fix(tests): Update test runner and imports, refresh README and package metadata, add project tooling/config files

.serena/memories/task_completion_checklist.md

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+# Task Completion Checklist for TaskBuffer
+
+## Before Marking Any Task Complete
+
+### 1. Code Quality Checks
+- [ ] Run build to ensure TypeScript compiles: `pnpm run build`
+- [ ] Run tests to ensure nothing breaks: `pnpm test`
+- [ ] Type check test files: `tsbuild check test/**/* --skiplibcheck`
+
+### 2. Code Review
+- [ ] All changes are focused and purposeful
+- [ ] No unnecessary modifications made
+- [ ] Code follows project naming conventions
+- [ ] Imports use the plugins.ts pattern where applicable
+- [ ] All async operations use proper async/await
+
+### 3. Testing
+- [ ] New features have corresponding tests
+- [ ] Existing tests still pass
+- [ ] Test files end with `export default tap.start()`
+- [ ] Tests use proper expect from tapbundle
+
+### 4. Documentation
+- [ ] readme.md updated if new features added
+- [ ] Code is self-explanatory (no comments unless requested)
+- [ ] API changes documented
+
+### 5. Git Hygiene
+- [ ] Changes are staged appropriately
+- [ ] Commit message is clear and focused
+- [ ] NO commits made without explicit user approval
+
+## Common Issues to Check
+- No uppercase filenames
+- No direct npm usage (use pnpm)
+- No guessing APIs (always check documentation)
+- No partial implementations