Add Chef package registry (#22554)

This PR implements a [Chef registry](https://chef.io/) to manage
cookbooks. This package type was a bit complicated because Chef uses RSA
signed requests as authentication with the registry.


![grafik](https://user-images.githubusercontent.com/1666336/213747995-46819fd8-c3d6-45a2-afd4-a4c3c8505a4a.png)


![grafik](https://user-images.githubusercontent.com/1666336/213748145-d01c9e81-d4dd-41e3-a3cc-8241862c3166.png)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/packages/descriptor.go

@@ -12,6 +12,7 @@ import (
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/packages/cargo"
+	"code.gitea.io/gitea/modules/packages/chef"
 	"code.gitea.io/gitea/modules/packages/composer"
 	"code.gitea.io/gitea/modules/packages/conan"
 	"code.gitea.io/gitea/modules/packages/conda"
@@ -132,6 +133,8 @@ func GetPackageDescriptor(ctx context.Context, pv *PackageVersion) (*PackageDesc
 	switch p.Type {
 	case TypeCargo:
 		metadata = &cargo.Metadata{}
+	case TypeChef:
+		metadata = &chef.Metadata{}
 	case TypeComposer:
 		metadata = &composer.Metadata{}
 	case TypeConan:

models/packages/package.go

@@ -31,6 +31,7 @@ type Type string
 // List of supported packages
 const (
 	TypeCargo     Type = "cargo"
+	TypeChef      Type = "chef"
 	TypeComposer  Type = "composer"
 	TypeConan     Type = "conan"
 	TypeConda     Type = "conda"
@@ -48,6 +49,7 @@ const (
 
 var TypeList = []Type{
 	TypeCargo,
+	TypeChef,
 	TypeComposer,
 	TypeConan,
 	TypeConda,
@@ -68,6 +70,8 @@ func (pt Type) Name() string {
 	switch pt {
 	case TypeCargo:
 		return "Cargo"
+	case TypeChef:
+		return "Chef"
 	case TypeComposer:
 		return "Composer"
 	case TypeConan:
@@ -103,6 +107,8 @@ func (pt Type) SVGName() string {
 	switch pt {
 	case TypeCargo:
 		return "gitea-cargo"
+	case TypeChef:
+		return "gitea-chef"
 	case TypeComposer:
 		return "gitea-composer"
 	case TypeConan: