fix(build): prevent index.ts file from being copied into dist

[wise-king-sullyman]

What

Closes #118

Description

Prevents TypeScript files from being copied to the dist/{module}/css directory at build time. Still allows type declaration files to be copied.

Type of change

• [ ] Feature
• [ ] Bugfix
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [x] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

Screen shots / Gifs for design review

[wise-king-sullyman]

Is this good to merge?

I'm not super sure what the merge policy is in this repo.

[github-actions[bot]]

:tada: This PR is included in version 5.2.0-prerelease.2 :tada:

The release is available on:

• GitHub release
• npm package (@prerelease dist-tag)

Your semantic-release bot :package::rocket: