feat: expand api w/ .forProject(string),.withTsConfig(string|TsConfig)

[dherges]

I'm submitting a...

[ ] Bug Fix
[x] Feature
[ ] Other (Refactoring, Added tests, Documentation, ...)

Checklist

• Commit Messages follow the Conventional Commits pattern
  • A feature commit message is prefixed "feat:"
  • A bugfix commit message is prefixed "fix:"
• Tests for the changes have been added

Description

Closes #557

Does this PR introduce a breaking change?

[ ] Yes
[x] No

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