Prepare npm alpha readiness and README demos

[slashdevcorpse]

Summary:

• Upgrades the public README with a centered preview, badges, contents, npx alpha status, terminal demo blocks, and beta-track checklist.
• Updates the package README with npx alpha install guidance, local source verification commands, command table, and publish checklist.
• Hardens npm package metadata and changes the release script to publish with the alpha dist-tag.
• Removes stale CLI help wording from the init command.

Validation:

• node packages/codex-claw/bin/codex-claw.js --help
• node packages/codex-claw/bin/codex-claw.js doctor
• pnpm pack:codex-claw
• npm publish --dry-run --tag alpha --access public
• pnpm -C apps/codex-claw test
• pnpm -C apps/codex-claw build
• pnpm -C apps/landing build
• rg legacy source-project names across public surfaces

Closes #16

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Summary by cubic

Prepares the first npm alpha: refreshed READMEs with demos and npx install guidance, hardened package metadata, and switched the publish flow to the alpha dist‑tag. Also cleans up the CLI help text for init.

• New Features
  • Public README: centered preview, badges, contents, npx alpha status, terminal demos, and beta-track checklist.
  • Package README: npx codex-claw@alpha guidance, local verification commands, command table, and publish checklist.
  • Release scripts: added pack:codex-claw; release:codex-claw now publishes with --tag alpha.
  • Package metadata: improved description, keywords, homepage, bugs, repository, and publishConfig.tag: alpha.
  • CLI: updated init help copy to remove stale “legacy” wording.

^{Written for commit 9beada1. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 5 files

_{Re-trigger cubic}

[Copilot]

Pull request overview

Prepares the repository and codex-claw CLI package for an initial npm alpha release by updating public/package documentation, tightening npm package metadata, and ensuring releases publish under the alpha dist-tag (supporting the intended npx codex-claw@alpha workflow).

Changes:

• Refreshes the root README and the CLI package README with alpha-status messaging, npx-first guidance, demos, and checklists.
• Adds/updates npm package metadata fields (homepage, bugs, repository, keywords) and sets publishConfig.tag to alpha.
• Updates monorepo scripts to support npm pack --dry-run inspection and to publish with --tag alpha, plus removes stale “legacy” wording in CLI help.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
README.md	Reworks public-facing docs to emphasize alpha status, npx target workflow, and operational checklists/demos.
packages/codex-claw/README.md	Updates package-level README for alpha npx usage, command reference, and publish checklist.
packages/codex-claw/package.json	Hardens npm metadata (repository/bugs/homepage/keywords) and sets alpha dist-tag publish config.
packages/codex-claw/bin/codex-claw.js	Updates CLI help text to remove stale “legacy” phrasing for init.
package.json	Adds pack:codex-claw and updates release:codex-claw to publish with the alpha dist-tag.

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