Update README and improve agent skill documentation

[asphaltbuffet]

This pull request introduces substantial improvements to project documentation and build tooling, focusing on clarifying architecture, conventions, and workflows for the wherehouse CLI inventory system. It adds new and reorganized documentation files covering the domain model, technical stack, conventions, and development practices. The build process is streamlined by enhancing the pre-release automation. Several code style and convention documents are updated for accuracy, and open TODOs are tracked for future improvements.

Documentation and Project Structure:

• Added new documentation files: CONTEXT.md (domain model and glossary), .serena/memories/core.md (layered architecture), .serena/memories/tech_stack.md (technology stack), .serena/memories/conventions.md (code and workflow conventions), .serena/memories/task_completion.md (commit checklist), and updated .serena/memories/project_overview.md (file/package structure and responsibilities). [1] [2] [3] [4] [5] [6]

• Updated .serena/memories/suggested_commands.md to provide a concise, modernized list of build, test, and VCS commands, emphasizing mise and jj usage.

Build and Release Automation:

• Renamed .mise/tasks/release_notes to .mise/tasks/pre-release and extended it to update pinned Nix version references in README.md, improving release consistency. Updated .goreleaser.yml to use the new pre-release task. [1] [2] [3]

Code Style, Conventions, and Open TODOs:

• Refined .serena/memories/code_style_and_conventions.md to clarify interface usage, event type registration, error handling, and database practices. Added a section for open TODOs from code review. [1] [2]

Agent and Issue Tracker Documentation:

• Expanded CLAUDE.md with sections on agent skills, GitHub issue tracker integration, triage label vocabulary, and domain documentation practices.

Permissions and Settings:

• Updated .claude/settings.local.json to enable additional plugins, including GitHub issue writing and memory management features.

These changes collectively improve onboarding, maintainability, and development efficiency by making the architecture, conventions, and workflows explicit and actionable.