fix: migrate to Policyfile and clean up docs

[damacus]

Summary

• replace Berksfile/Berkshelf usage with Policyfile resolution
• map the Kitchen default suite to the Policyfile named run list
• clean up resource documentation tables so markdownlint passes

Verification

• chef install Policyfile.rb
• cookstyle --no-server --cache-root /private/tmp/rubocop_cache
• env GEM_HOME=/opt/chef-workstation/embedded/lib/ruby/gems/3.1.0 GEM_PATH=/opt/chef-workstation/embedded/lib/ruby/gems/3.1.0 GEM_PATH_SYSTEM= /opt/chef-workstation/embedded/bin/rspec --format documentation
• /opt/homebrew/bin/markdownlint-cli2 "**/*.md"
• git diff --check

Kitchen note: KITCHEN_LOCAL_YAML=kitchen.dokken.yml kitchen test default-debian-12 --destroy=always could not start because kitchen-dokken could not connect to unix:///var/run/docker.sock in this local environment. CI is the Kitchen gate.

[github-actions]

Slowest examples

Top 1 slowest examples (0 seconds, 100% of total time)

Example	Description	Time in seconds
spec/unit/recipes/default_spec.rb:7	default recipe on ubuntu 16.04 converges successfully	0.0096