Convert type-length-value-js to oxlint and oxfmt

[clankmaxxing-clod]

Replaces ESLint + Prettier with oxlint and oxfmt for the type-length-value-js package, mirroring solana-program/token-group#115 and solana-program/token-metadata#120.

Changes

• package.json: dropped eslint, typescript-eslint, @eslint/js, @eslint/eslintrc, eslint-plugin-import-extensions, prettier, and @solana/prettier-config-solana; added oxlint and oxfmt. Scripts now run the Oxc tools:
  • lint → oxlint --max-warnings 0
  • lint:fix → oxlint --fix
  • format → oxfmt --check src test
  • format:fix → oxfmt --write src test
• .oxlintrc.json (new) mirrors the old flat ESLint config: correctness category as errors; consistent-type-imports enforced; ban-ts-comment / no-explicit-any / no-unused-vars / no-empty-object-type disabled; import/extensions (import plugin) replaces eslint-plugin-import-extensions and stays disabled for test/examples.
• .oxfmtrc.json (new) migrated from the existing .prettierrc via oxfmt --migrate=prettier (printWidth 80, tabWidth 4, single quotes, semicolons, trailingComma: es5, arrowParens: always).
• Removed eslint.config.mjs and .prettierrc.
• Updated pnpm-lock.yaml (CI installs with --frozen-lockfile).

Notes

• CI invokes pnpm lint / pnpm format through the repo Makefile, so no workflow files needed changing.
• Existing source is already oxfmt-clean and oxlint-clean — no source reformatting in this PR.

Verification

pnpm install --frozen-lockfile, pnpm lint, pnpm format, pnpm build, and pnpm test (6 passing) all succeed.

🤖 Generated with Claude Code