feat(template)!: unify JS/TS templates

[erickzhao]

Having separate packages for TypeScript-based templates is a burden. You need to duplicate any bundler-related template work, which leaves our templates open to drift.

This PR attempts to reconcile the two templates variants together, and to have --typescript as an instantiation option.

The crux to this approach is that a lot of TypeScript files can be stripped by default in Node 22.13+ with node:module's stripTypeScriptTypes function.

For app code: this works great.

For bundler-specific config: This works great for Vite, since it supports TS out of the box without additional configuration. For webpack, we still need to configure additional loaders, so the bundler configurations are kept separate for JS/TS.

[socket-security]

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

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​electron-forge/​plugin-webpack@​0.0.0-use.local

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