[create-aptos-dapp] Fix template content and rename templates

[0xmaayan]

Description

One concern is the URL changes - any workaround?

Checklist

• Do all Lints pass?
  • [ ] Have you ran pnpm spellcheck?
  • [ ] Have you ran pnpm fmt?
  • [ ] Have you ran pnpm lint?

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[0xmaayan]

Need to update redirects in next.config.js as well

done