create-astro combine strict tsconfigs

[laesse]

Changes

fixing #4297

• merge the tsconfig.json of the template into tsconfig.strict.json instead of overriding it
• this implementation preserves the comments in the tsconfig
• Templates that have custom tsconfigs can keep the specific compilerOptions but still have the strict mode options enabled.
• when the option is present in both the strict option overrides the template option

This leads to less broken strict/strictest templates on project start

Testing

I tested it locally
I have not written any unit tests, jet

Docs

• no docs added because it is fixing behaviour that is expected in my opinion

[changeset-bot]

🦋 Changeset detected

Latest commit: db84caa

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

This PR includes changesets to release 1 package

Name	Type
create-astro	Minor

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[matthewp]

@laesse can you fix the lint errors? Thank you!

[Princesseuh]

Hello! Thank you very much for making this PR (and making me discover that npm package, I didn't know that existed!). We're currently aiming toward a different direction to tackle this issue, see #4439, so we'll close this PR in favour of that.

Again, we're really thankful for your work on this and are really glad you choose to contribute to the project!