feat(template): replace eslint/prettier with oxc.rs stack

[erickzhao]

Closes #4170.

I figured we might as well migrate to oxfmt if we're going to use oxlint for the templates and provide both to users.

Note that we previously didn't ship any formatting to users, so this is a nice-to-have.

This PR:

• swaps out eslint for oxlint in the template initialization code
• swaps out prettier for oxfmt
• keeps diff minimal by aligning the .oxfmtrc.json with existing rules
• copies .oxfmtrc.json from the root of the repo to each template (while deleting ignorePaths)
• fixes a bug in BaseTemplate initialization where there was no way to remove a line when programatically splicing files (now null return values delete the line)

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	oxfmt@​0.41.0
	electron@​39.8.6 ⏵ 41.2.0	+1		+1

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[socket-security]

All alerts resolved. Learn more about Socket for GitHub.

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

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[erickzhao]

7c4251a applies linting consistently across all non-base templates via a shared writeLintConfig handler!