Add Swift package registry (#22404)

This PR adds a [Swift](https://www.swift.org/) package registry.


![grafik](https://user-images.githubusercontent.com/1666336/211842523-07521cbd-8fb6-400f-820c-ee8048b05ae8.png)

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -1254,6 +1254,7 @@ Task queue configuration has been moved to `queue.task`. However, the below conf
 - `LIMIT_SIZE_PUB`: **-1**: Maximum size of a Pub upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 - `LIMIT_SIZE_PYPI`: **-1**: Maximum size of a PyPI upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 - `LIMIT_SIZE_RUBYGEMS`: **-1**: Maximum size of a RubyGems upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
+- `LIMIT_SIZE_SWIFT`: **-1**: Maximum size of a Swift upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 - `LIMIT_SIZE_VAGRANT`: **-1**: Maximum size of a Vagrant upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 
 ## Mirror (`mirror`)

docs/content/doc/packages/overview.en-us.md

@@ -40,6 +40,7 @@ The following package managers are currently supported:
 | [Pub]({{< relref "doc/packages/pub.en-us.md" >}}) | Dart | `dart`, `flutter` |
 | [PyPI]({{< relref "doc/packages/pypi.en-us.md" >}}) | Python | `pip`, `twine` |
 | [RubyGems]({{< relref "doc/packages/rubygems.en-us.md" >}}) | Ruby | `gem`, `Bundler` |
+| [Swift]({{< relref "doc/packages/rubygems.en-us.md" >}}) | Swift | `swift` |
 | [Vagrant]({{< relref "doc/packages/vagrant.en-us.md" >}}) | - | `vagrant` |
 
 **The following paragraphs only apply if Packages are not globally disabled!**

docs/content/doc/packages/swift.en-us.md

@@ -0,0 +1,93 @@
+---
+date: "2023-01-10T00:00:00+00:00"
+title: "Swift Packages Repository"
+slug: "packages/swift"
+draft: false
+toc: false
+menu:
+  sidebar:
+    parent: "packages"
+    name: "Swift"
+    weight: 95
+    identifier: "swift"
+---
+
+# Swift Packages Repository
+
+Publish [Swift](hhttps://www.swift.org/) packages for your user or organization.
+
+**Table of Contents**
+
+{{< toc >}}
+
+## Requirements
+
+To work with the Swift package registry, you need to use [swift](https://www.swift.org/getting-started/) to consume and a HTTP client (like `curl`) to publish packages.
+
+## Configuring the package registry
+
+To register the package registry and provide credentials, execute:
+
+```shell
+swift package-registry set https://gitea.example.com/api/packages/{owner}/swift -login {username} -password {password}
+```
+
+| Placeholder  | Description |
+| ------------ | ----------- |
+| `owner`      | The owner of the package. |
+| `username`   | Your Gitea username. |
+| `password`   | Your Gitea password. If you are using 2FA or OAuth use a [personal access token]({{< relref "doc/developers/api-usage.en-us.md#authentication" >}}) instead of the password. |
+
+The login is optional and only needed if the package registry is private.
+
+## Publish a package
+
+First you have to pack the contents of your package:
+
+```shell
+swift package archive-source
+```
+
+To publish the package perform a HTTP PUT request with the package content in the request body.
+
+```shell --user your_username:your_password_or_token \
+curl -X PUT --user {username}:{password} \
+	 -H "Accept: application/vnd.swift.registry.v1+json" \
+	 -F source-archive=@/path/to/package.zip \
+	 -F metadata={metadata} \
+	 https://gitea.example.com/api/packages/{owner}/swift/{scope}/{name}/{version}
+```
+
+| Placeholder | Description |
+| ----------- | ----------- |
+| `username`  | Your Gitea username. |
+| `password`  | Your Gitea password. If you are using 2FA or OAuth use a [personal access token]({{< relref "doc/developers/api-usage.en-us.md#authentication" >}}) instead of the password. |
+| `owner`     | The owner of the package. |
+| `scope`     | The package scope. |
+| `name`      | The package name. |
+| `version`   | The package version. |
+| `metadata`  | (Optional) The metadata of the package. JSON encoded subset of https://schema.org/SoftwareSourceCode |
+
+You cannot publish a package if a package of the same name and version already exists. You must delete the existing package first.
+
+## Install a package
+
+To install a Swift package from the package registry, add it in the `Package.swift` file dependencies list:
+
+```
+dependencies: [
+	.package(id: "{scope}.{name}", from:"{version}")
+]
+```
+
+| Parameter   | Description |
+| ----------- | ----------- |
+| `scope`     | The package scope. |
+| `name`      | The package name. |
+| `version`   | The package version. |
+
+Afterwards execute the following command to install it:
+
+```shell
+swift package resolve
+```