chore(templates): alias react to preact/compat in tsconfig

[rschristian]

Description

Adds TS aliases for react and react-dom, which we (the Preact team) recommend users who wish to make use of preact/compat do (@preactjs/preset-vite has the react, react-dom -> preact/compat aliases enabled by default).

Additional context

I've seen a handful of users confused about type errors, assuming the preset would handle aliasing fully, including the TS portion. Obviously this isn't the case, but I'd like to provide a nicer experience out-of-the-box for these users.

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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