ci(release): refine stable release workflow

[crup]

Refines the stable-release workflow and public install docs after the first stable release.

Changes:

• Changes public README/docs/AI context install snippets from alpha to npm latest.
• Updates the README npm badge to the default npm version badge.
• Removes the default alpha publish tag from package.json publishConfig.
• Adds dropdown workflow inputs for the stable publish gate and version bump strategy.
• Makes patch the normal OSS release default.
• Computes the stable version from npm latest: first stable from a prerelease base resolves to 0.0.1, and after latest is 0.0.1, patch resolves to 0.0.2.
• Expands release-channel docs with release action guidance for chore/docs, patch, minor, and major changes.

Validation run locally:

• pnpm typecheck
• pnpm test
• pnpm build
• pnpm docs:build
• pnpm readme:check
• pnpm size
• pnpm pack --dry-run
• git diff --check

[github-actions]

Bundle size report

Entry	Files	Raw	Gzip	Brotli	Raw delta	Gzip delta	Brotli delta
core	2	4.44 kB	1.52 kB	1.40 kB	0 B	0 B	0 B
timer group add-on	3	10.93 kB	3.83 kB	3.50 kB	0 B	0 B	0 B
schedules add-on	3	8.62 kB	3.02 kB	2.78 kB	0 B	0 B	0 B
duration helper	1	318 B	224 B	192 B	0 B	0 B	0 B
diagnostics helper	1	105 B	115 B	90 B	0 B	0 B	0 B
core CJS	1	4.71 kB	1.63 kB	1.50 kB	0 B	0 B	0 B
timer group CJS	1	11.02 kB	3.86 kB	3.54 kB	0 B	0 B	0 B
schedules CJS	1	8.71 kB	3.04 kB	2.81 kB	0 B	0 B	0 B
duration CJS	1	808 B	475 B	424 B	0 B	0 B	0 B
diagnostics CJS	1	605 B	367 B	326 B	0 B	0 B	0 B