Modernize tooling and CI/CD: migrate to oxlint/oxfmt, update GitHub Actions, and upgrade dependencies

[Himenon]

Summary

• Updated GitHub Actions versions to latest SHA-pinned form across all workflows
  • actions/checkout v3/v2 → de0fac2e (v6.0.2)
  • pnpm/action-setup v2.2.2 → 0e279bb9 (v6.0.8)
  • actions/setup-node v1/v2 → 48b55a01 (v6.4.0)
  • Unified node-version to node-version-file: "package.json"
  • Added permissions: id-token: write to release-npm-registry for NPM Provenance support
  • Added missing description field and fixed email typo in initialize/action.yml
• Removed biome.json and migrated to oxlint / oxfmt
  • Added .oxfmtrc.json (printWidth: 144)
  • Updated lint, format, and validate scripts to use oxlint / oxfmt
• Upgraded devDependencies based on ncu -c 14d
  • typescript 5.3.3 → 6.0.3, vitest ^1.2.2 → ^4.1.6, @types/node 20 → 25, etc.
  • Removed @biomejs/biome, added oxlint ^1.64.0 and oxfmt ^0.49.0
• Added pnpm-workspace.yaml (minimumReleaseAge: 20160, onlyBuiltDependencies config)
• Fixed action && actions.push(action) in src/index.ts to an explicit if block per oxlint warning
• Simplified package.json exports by removing redundant node and default conditions
• Fixed deprecated moduleResolution: node and added ignoreDeprecations: "6.0" in tsconfig.json to resolve TypeScript 6.0 build errors

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