refactor: remove all Claude references — this is a GitHub Copilot blu…

…eprint

Remove CLAUDE.md, .claude/ directory, and Claude agent format references
from all 10 affected files. This repository is exclusively focused on
GitHub Copilot customizations for VS Code.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

docs: add agentskills.io spec fields, plugin settings, and CLAUDE.md …

…audit checks

- skill-builder: add license, compatibility, metadata, allowed-tools fields
  and scripts/references/assets directory structure from agentskills.io spec
- compatibility-checker: add terminal sandbox, MCP discovery, autopilot,
  and plugin settings (chat.plugins.enabled/marketplaces/paths)
- setup-audit: add CLAUDE.md and .claude/agents/ to audit checklists,
  add plugins/autopilot/MCP discovery to recommended settings
- new-agent prompt: add Claude agent format (.claude/agents/) section
- new-skill prompt: add license, compatibility, metadata optional fields

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

feat: add hooks support, agent plugins docs, and align with latest VS…

… Code Copilot docs

- Add new /copilot-new-hook prompt for lifecycle automation
- Add hooks and agent plugins documentation across all skills
- Add CLAUDE.md cross-tool compatibility support
- Update agent/skill/prompt frontmatter with new fields
- Fix user-invokable typo to user-invocable across all files
- Replace deprecated infer with user-invocable/disable-model-invocation
- Update VS Code settings with new Copilot feature flags
- Update compatibility matrix (Agent Skills now stable, hooks/plugins preview)
- Update README with hooks, new prompt, VS Code 1.95+ prereq

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

feat: add release automation, commit linting, template sync, and upda…

…te to latest APIs

fix: add missing newlines for improved readability in SKILL.md

refactor: rename skills and prompts with copilot- prefix for clarity

- Skills: compatibility-checker → copilot-compatibility-checker
- Skills: copilot-audit → copilot-setup-audit
- Skills: customization-selector → copilot-customization-selector
- Skills: skill-builder → copilot-skill-builder
- Prompts: all renamed with copilot- prefix for consistency
- Updated all references in README.md and SKILL.md files
- Makes customizations clearer when imported into other repos

fix: add missing newlines for better readability in SKILL.md

fix: remove duplicate path-ignore entry in release workflow

chore: add markdownlint config to disable overly strict rules

- Disable MD013 (line length) - not useful for documentation
- Disable MD033 (inline HTML) - sometimes needed
- Disable MD036 (emphasis as heading) - false positives
- Disable MD040 (fenced code language) - not always applicable
- Disable MD060 (table column style) - too pedantic about spacing

fix: release workflow should trigger for customization file changes

Changed paths-ignore from '**.md' to specific documentation files so that
changes to .prompt.md, .agent.md, and SKILL.md files properly trigger releases