chore: rename `standard` script to `lint`; enable linting in ci

[Fdawgs]

Brings repo into line with other plugin repos, which have lint scripts.

Checklist

• [x] commit message and code follows the Developer's Certification of Origin and the Code of conduct

[Fdawgs]

CI failing due to error fastify-plugin: @fastify/leveldb - expected '^4.0.0' fastify version, '4.0.0-rc.3' is installed.

Needs https://github.com/fastify/fastify-leveldb/pull/96 to be resolved.