Make Conventional Commits (type(scope): description) the canonical
commit and PR-title format across Sea Haven, replacing the previous
imperative/capitalized/no-prefix rule.
- commit-messages.md: full rewrite to the type(scope): description
format with the type table, lowercase/imperative description rules,
breaking-change (! + BREAKING CHANGE footer) guidance tied to SemVer,
and updated template and examples.
- git-workflow.md: extend the branch-prefix table with chore/, docs/,
refactor/, and release/ (alongside the existing feature/bug/hotfix),
mirroring the commit types.
- pull-requests.md: reconcile the title rule to the Conventional Commit
format.
- README.md: update the commit-messages one-line summary.
Refs: INFRA-57
Work is tracked in Jira while code lives in GitHub; the org-level GitHub
for Jira app is already installed but nothing told contributors how to
trigger the link. Document putting the Jira key in the branch name, PR
title, or Refs trailer so branches, commits, and PRs thread into the
issue's development panel. Use a generic PROJ-123 placeholder rather
than naming specific projects, which change over time.
