ci: support major/minor release bumps via PR title convention

[mikemadeja]

Summary

• The auto-release workflow (CreateRelease.yml) always bumped only the patch version on every develop->main merge, with no way to cut a major or minor release
• Including "major release" or "minor release" (case-insensitive, anywhere in the title) in the develop->main PR's title now bumps that version component instead and resets the components below it to 0 - e.g. a PR titled "Major release: v1.0.0" against the current v0.0.40 tag produces v1.0.0
• Titles without either phrase keep the existing patch-bump behavior, so this is fully backward compatible

Test plan

• Verified the bump logic in isolation with sample PR titles (Major release: ... -> major bump, Minor Release: ... -> minor bump, ordinary titles -> patch bump as before)
• YAML parses correctly
• N/A - can't run the actual GitHub Actions workflow outside of a real PR merge event; this will be exercised for real the next time a develop->main PR titled "major release"/"minor release" merges

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