Add terraform state registry (#36710)

Adds terraform/opentofu state registry with locking. Implements: https://github.com/go-gitea/gitea/issues/33644. I also checked [encrypted state](https://opentofu.org/docs/language/state/encryption), it works out of the box.

Docs PR: https://gitea.com/gitea/docs/pulls/357

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Co-authored-by: Andras Elso <elso.andras@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/api/v1/packages/package.go

@@ -43,7 +43,7 @@ func ListPackages(ctx *context.APIContext) {
 	//   in: query
 	//   description: package type filter
 	//   type: string
-	//   enum: [alpine, cargo, chef, composer, conan, conda, container, cran, debian, generic, go, helm, maven, npm, nuget, pub, pypi, rpm, rubygems, swift, vagrant]
+	//   enum: [alpine, cargo, chef, composer, conan, conda, container, cran, debian, generic, go, helm, maven, npm, nuget, pub, pypi, rpm, rubygems, swift, terraform, vagrant]
 	// - name: q
 	//   in: query
 	//   description: name filter