docs: add instructions to use the package installed locally

[donaminos]

Description

The instructions regarding local setup wee a bit confusing, particularly in the "Add hook" section where npx was used to run commitlint instead of the locally installed package.

I have updated the instructions to provide greater clarity and accommodate those who prefer a 100% local setup. The revised steps now include guidance on utilizing the locally installed commitlint package.

Motivation and Context

When I read the documentation to use commitlint I was confused by the local setup using npx to run the command instead of the package installed locally

Usage examples

npm pkg set scripts.commitlint="commitlint --edit"
npx husky add .husky/commit-msg 'npm run commitlint ${1}'

How Has This Been Tested?

Follow the instructions on the doc, section Add hooks:

npm pkg set scripts.commitlint="commitlint --edit"
npx husky add .husky/commit-msg 'npm run commitlint ${1}'

Everything is working as before.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Docs

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[escapedcat]

Thanks!