refactor: replace shell commands with filesystem API in project creation

[AsterisMono]

Please verify the following:

• [x] yarn test jest tests pass with new tests, if relevant
• [x] yarn lint eslint checks pass with new code, if relevant
• [x] yarn format:check prettier checks pass with new code, if relevant
• [ ] README.md (or relevant documentation) has been updated with your changes
• [ ] If this affects functionality there aren't tests for, I manually tested it, including by generating a new app locally if needed (see docs).

Describe your PR

Fixes #2816.

This PR replaces the rm and mv shell commands in project creation with gluegun (fs-jetpack) filesystem calls to ensure compatibility with Windows (Since there's no mv and rm in Windows CMD).

[frankcalise]

Thanks for this! We will try and get it tested soon

[infinitered-circleci]

:tada: This PR is included in version 10.0.2 :tada:

The release is available on:

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

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