Add Xote and Xote SSR templates

[brnrdog]

Summary

• Adds two new templates:
  • rescript-template-xote — Xote with Vite, rescript-signals and Tailwind 4 (CSR)
  • rescript-template-xote-ssr — Xote with Vite, rescript-signals and Tailwind 4 (SSR via Node server)
• Groups both under a single "Xote" entry in the interactive picker; selecting it prompts a follow-up question for CSR or SSR.
• CLI flags --template xote and --template xote-ssr resolve directly to each variant for non-interactive use.
• Follows existing template conventions: name fields aligned to the folder name, res:* scripts ordered first in package.json, _gitignore (renamed to .gitignore on copy), and rescript left out of devDeps so CRA installs the user-selected version.

Test plan

• npm test passes
• Interactive flow: picking "Xote" prompts a CSR/SSR follow-up
• npm create rescript-app@latest my-app -- --template xote scaffolds and npm run dev works
• npm create rescript-app@latest my-app -- --template xote-ssr scaffolds and npm run dev works

[pkg-pr-new]

Open in StackBlitz

npx https://pkg.pr.new/create-rescript-app@124

commit: d77ce90