remove some warnings

[aspeddro]

• Remove esbuild-loader. - Next warning
  • Next use swc internally.
• Add key for <li> elements - React warning
• Rename prop hrefRel to hrefrel in Next.Link - React warning
• Fix warnings with deprecated tailwindcss = tailwindcss warning

For some reason esbuild-loader are generated some warnings when run npm run dev

<w> [webpack.cache.PackFileCacheStrategy] Skipped not serializable cache item 'Compilation/modules|/home/pedro/Desktop/projects/rescript-
lang.org/node_modules/next/dist/compiled/@next/react-refresh-utils/dist/loader.js!/home/pedro/Desktop/projects/rescript-lang.org/node_mod
ules/next/dist/build/webpack/loaders/next-swc-loader.js??ruleSet[1].rules[6].oneOf[2].use[1]!/home/pedro/Desktop/projects/rescript-lang.o
rg/node_modules/esbuild-loader/dist/index.cjs??ruleSet[1].rules[11].use[0]!/home/pedro/Desktop/projects/rescript-lang.org/pages/_app.js':
 No serializer registered for ProvidedDependency
<w> while serializing webpack/lib/cache/PackFileCacheStrategy.PackContentItems -> webpack/lib/NormalModule -> Array { 9 items } -> Provid
edDependency
<w> [webpack.cache.PackFileCacheStrategy] Skipped not serializable cache item 'Compilation/modules|/home/pedro/Desktop/projects/rescript-
lang.org/node_modules/next/dist/build/webpack/loaders/next-swc-loader.js??ruleSet[1].rules[6].oneOf[2].use[0]!/home/pedro/Desktop/project
s/rescript-lang.org/node_modules/esbuild-loader/dist/index.cjs??ruleSet[1].rules[10].use[0]!/home/pedro/Desktop/projects/rescript-lang.or
g/pages/_app.js': No serializer registered for ProvidedDependency
<w> while serializing webpack/lib/cache/PackFileCacheStrategy.PackContentItems -> webpack/lib/NormalModule -> Array { 9 items } -> Provid
edDependency

[vercel]

@aspeddro is attempting to deploy a commit to the ReScript Association Team on Vercel.

A member of the Team first needs to authorize it.

[fhammerschmidt]

Was that rule from before the latest Next upgrade?
Edit: So it was from your upgrade. Then I guess it's not needed anymore now?

[aspeddro]

Probably after #723, but I don't remember seeing these warnings in the update. However, it is good to get rid of configuration that is not necessary.

[fhammerschmidt]

This unfortunately broke the playground, so I reverted it.