feat: better project gen function

[JoeyDoey]

• better project gen functionality
• code clean up
• drop styled-components (tailwind only for now)
• better manifest handling
• clean up sample test files
• better project-gen + first-run (hooopefully)

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 3aa3b96da2782e8b8f7199e69e42f338f5f63fa7

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

| Name | Type | | --------------- | ----- | | @bedframe/core | Patch | | @bedframe/cli | Patch | | create-bedframe | Patch |

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