fix(ci): Update workflows to use release pipeline

[damacus]

Updates workflows to @5.0.3.

Changes

• Updated ci.yml to @5.0.3 with secrets: inherit
• Created release.yml with permissions block
• Created conventional-commits.yml, prevent-file-change.yml, copilot-setup-steps.yml
• Created/updated .markdownlint-cli2.yaml
• Created/updated release-please config files (version: 7.0.24)
• Cleaned up CHANGELOG.md

Webhooks

• Webhooks disabled prior to merge

[github-actions]

Slowest examples

Top 5 slowest examples (1.06 seconds, 100% of total time)

Example	Description	Time in seconds
spec/unit/recipes/server_spec.rb:32	openvpn::server When push_options & push_routes are set, on Ubuntu makes a server.conf from template with multiple push routes	1.06305
spec/unit/recipes/server_spec.rb:25	openvpn::server When push_options & push_routes are set, on Ubuntu makes a server.conf from template with dhcp options	0.0024
spec/unit/recipes/server_spec.rb:39	openvpn::server When push_options & push_routes are set, on Ubuntu executes gencrl with correction parameters	0.00065
spec/unit/recipes/server_spec.rb:62	openvpn::server When push_options & push_routes are set, on Ubuntu creates a world readable CRL file	0.00038
spec/unit/recipes/server_spec.rb:21	openvpn::server When push_options & push_routes are set, on Ubuntu converges successfully	0.00033