This PR applies the changes from opentelemetry-java-instrumentation#14155 to enable local execution of lychee link checking with Docker.

Changes Made

New Files

• lychee.toml - Configuration file with settings moved from workflow args, including the performance comment from the original workflow
• .github/scripts/check-links.sh - Docker-based script for local lychee execution
• .github/scripts/dependencies.dockerfile - Enables Renovate auto-updates for lychee Docker image
• .github/workflows/reusable-check-links.yml - New workflow that uses the script instead of lychee-action

Modified Files

• .github/workflows/build.yml - Updated to reference the new reusable-check-links.yml workflow

Removed Files

• .github/workflows/reusable-markdown-link-check.yml - Replaced by the new script-based approach

Benefits

✅ Local execution: Users can now run GITHUB_TOKEN=xxx ./.github/scripts/check-links.sh locally
✅ Same configuration: Uses identical settings as CI via shared lychee.toml
✅ Auto-updates: Renovate will keep the lychee Docker image version current
✅ Cross-platform: Works on Windows, macOS, and Linux with Docker

Configuration Moved

The following arguments were moved from the workflow to lychee.toml:

• --include-fragments → include_fragments = true
• --exclude "^https://github.com/open-telemetry/opentelemetry-java-contrib/(issues|pull)/\\d+$" → exclude array
• --max-retries 6 → max_retries = 6
• --max-concurrency 1 → max_concurrency = 1

The performance-related comment was preserved in the config file as requested.

Fixes #11.

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