Make it easier to run lychee locally

[Copilot]

This PR applies the changes from opentelemetry-java-instrumentation#14155 to make it easier to run lychee locally for link checking.

Changes Made

• Added lychee.toml with minimal configuration matching the current GitHub workflow arguments:

  • max_retries = 6
  • max_concurrency = 1
  • include_fragments = true
  • Exclude patterns for java-contrib issues/PRs

• Added .github/scripts/check-links.sh script that allows running lychee locally via Docker with the same configuration as CI

• Added .github/scripts/dependencies.dockerfile to track lychee version for Renovate auto-updates

• Replaced .github/workflows/reusable-markdown-link-check.yml with .github/workflows/reusable-check-links.yml that uses the new script

• Updated .github/workflows/build.yml to reference the new workflow

Benefits

• Developers can now run GITHUB_TOKEN=<token> ./.github/scripts/check-links.sh locally to check links
• Consistent behavior between local runs and CI
• Automatic version updates via Renovate
• No additional dependencies beyond Docker

The lychee.toml file contains only the configuration properties that were used in the GitHub workflow, without any additional comments that weren't present in the original workflow.

Fixes #19.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• activemq.apache.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• api.scorecard.dev
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• app.fossa.com
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• cassandra.apache.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• central.sonatype.com
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• cloud-native.slack.com
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• cloud.google.com
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• contrib.rocks
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• developer.mend.io
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• docs.aws.amazon.com
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• docs.cloudfoundry.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• docs.groovy-lang.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• docs.jboss.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• docs.oracle.com
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• en.wikipedia.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• groovy-lang.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• hadoop.apache.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• hbase.apache.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• img.shields.io
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• kafka.apache.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• opentelemetry.io
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• plugins.jenkins.io
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• scorecard.dev
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• semver.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• solr.apache.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• www.eclipse.org
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)
• www.jaegertracing.io
  • Triggering command: /usr/local/bin/lychee --verbose --config ./lychee.toml . (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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