Move package settings to package instead of being tied to version (#37026)

Unties settings page from package version and adds button to delete the
package version
Settings page now allows for deletion of entire package and it's
versions as opposed to a single version

Adds an API endpoint to delete the entire package with all versions from
registry

fixes: https://github.com/go-gitea/gitea/issues/36904

Co-Authored-By: gemini-3-flash

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>

models/packages/descriptor.go

@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"net/url"
 
+	"code.gitea.io/gitea/models/db"
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/cache"
@@ -53,8 +54,11 @@ func (l PackagePropertyList) GetByName(name string) string {
 
 // PackageDescriptor describes a package
 type PackageDescriptor struct {
-	Package           *Package
-	Owner             *user_model.User
+	// basic package info
+	Package *Package
+	Owner   *user_model.User
+
+	// package version info
 	Repository        *repo_model.Repository
 	Version           *PackageVersion
 	SemVer            *version.Version
@@ -77,6 +81,11 @@ func (pd *PackageDescriptor) PackageWebLink() string {
 	return fmt.Sprintf("%s/-/packages/%s/%s", pd.Owner.HomeLink(), string(pd.Package.Type), url.PathEscape(pd.Package.LowerName))
 }
 
+// PackageSettingsLink returns the relative package settings link
+func (pd *PackageDescriptor) PackageSettingsLink() string {
+	return fmt.Sprintf("%s/-/packages/settings/%s/%s", pd.Owner.HomeLink(), string(pd.Package.Type), url.PathEscape(pd.Package.LowerName))
+}
+
 // VersionWebLink returns the relative package version web link
 func (pd *PackageDescriptor) VersionWebLink() string {
 	return fmt.Sprintf("%s/%s", pd.PackageWebLink(), url.PathEscape(pd.Version.LowerVersion))
@@ -267,6 +276,15 @@ func GetPackageDescriptors(ctx context.Context, pvs []*PackageVersion) ([]*Packa
 	return getPackageDescriptors(ctx, pvs, cache.NewEphemeralCache())
 }
 
+// GetAllPackageDescriptors gets all package descriptors for a package
+func GetAllPackageDescriptors(ctx context.Context, p *Package) ([]*PackageDescriptor, error) {
+	pvs := make([]*PackageVersion, 0, 10)
+	if err := db.GetEngine(ctx).Where("package_id = ?", p.ID).Find(&pvs); err != nil {
+		return nil, err
+	}
+	return getPackageDescriptors(ctx, pvs, cache.NewEphemeralCache())
+}
+
 func getPackageDescriptors(ctx context.Context, pvs []*PackageVersion, c *cache.EphemeralCache) ([]*PackageDescriptor, error) {
 	pds := make([]*PackageDescriptor, 0, len(pvs))
 	for _, pv := range pvs {