feat: add 10 more plugins (batch 2)

[mturac]

Adds 10 new plugins across the appropriate sections:

• build-cache-analyzer → Automation DevOps — analyzes Turborepo/Nx/Webpack cache hit rates and finds what's busting the build cache
• config-schema-validator → Automation DevOps — validates Docker Compose, GitHub Actions, K8s, and other config files with auto-fix suggestions
• dead-end-finder → Code Quality Testing — finds unused exports, unreachable code, and orphaned API endpoints that silently accumulate
• flaky-test-hunter → Code Quality Testing — statistically detects and quarantines flaky tests by analyzing CI run history and timing variance
• type-coverage → Code Quality Testing — finds every TypeScript any, unsafe cast, @ts-ignore, and missing return type across the codebase
• dependency-graph-viz → Development Engineering — builds module import graph, detects circular dependencies and deep chains in the architecture
• refactor-preview → Development Engineering — shows blast radius before applying refactors — direct callers, indirect callers, test coverage, public API impact
• docs-sync-checker → Documentation — detects documentation drift — function names, paths, and CLI commands in docs that no longer match code
• semantic-release-notes → Git Workflow — generates changelogs and release notes from conventional commits with semver bump detection
• license-guard → Security, Compliance, & Legal — enforces license compliance policy on dependencies and generates SPDX-format Software Bill of Materials