feat(claude): add claude/CLAUDE.md, which will link to ~/.claude

Author: denolfe

claude/CLAUDE.md

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+Be extremely concise. Sacrifice grammar for the sake of concision.
+
+## Coding Patterns and Best Practices (Typescript)
+
+- Prefer single object parameters (improves backwards-compatibility)
+- Prefer types over interfaces (except when extending external types)
+- Prefer functions over classes (classes only for errors/adapters)
+- Organize functions top-down: exports before helpers
+- Use JSDoc for complex functions; add tags only when justified beyond type signature
+- Use `import type` for types, regular `import` for values, separate statements even from same module
+- Prefix booleans with `is`/`has`/`can`/`should` (e.g., `isValid`, `hasData`) for clarity
+- Commenting Guidelines
+  - Execution flow: Skip comments when code is self-documenting. Keep for complex logic, non-obvious "why", multi-line context, or if following a documented, multi-step flow.
+  - Top of file/module: Use sparingly; only for non-obvious purpose/context or an overview of complex logic.
+  - Type definitions: Property/interface documentation is always acceptable.