Kanban board (#8346)

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: jaqra <48099350+jaqra@users.noreply.github.com>
Co-authored-by: Kerry <flatline-studios@users.noreply.github.com>
Co-authored-by: Jaqra <jaqra@hotmail.com>
Co-authored-by: Kyle Evans <kevans91@users.noreply.github.com>
Co-authored-by: Tsakiridis Ilias <TsakiDev@users.noreply.github.com>
Co-authored-by: Ilias Tsakiridis <ilias.tsakiridis@outlook.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

models/unit.go

@@ -24,6 +24,7 @@ const (
 	UnitTypeWiki                                // 5 Wiki
 	UnitTypeExternalWiki                        // 6 ExternalWiki
 	UnitTypeExternalTracker                     // 7 ExternalTracker
+	UnitTypeProjects                            // 8 Kanban board
 )
 
 // Value returns integer value for unit type
@@ -47,6 +48,8 @@ func (u UnitType) String() string {
 		return "UnitTypeExternalWiki"
 	case UnitTypeExternalTracker:
 		return "UnitTypeExternalTracker"
+	case UnitTypeProjects:
+		return "UnitTypeProjects"
 	}
 	return fmt.Sprintf("Unknown UnitType %d", u)
 }
@@ -68,6 +71,7 @@ var (
 		UnitTypeWiki,
 		UnitTypeExternalWiki,
 		UnitTypeExternalTracker,
+		UnitTypeProjects,
 	}
 
 	// DefaultRepoUnits contains the default unit types
@@ -77,6 +81,7 @@ var (
 		UnitTypePullRequests,
 		UnitTypeReleases,
 		UnitTypeWiki,
+		UnitTypeProjects,
 	}
 
 	// NotAllowedDefaultRepoUnits contains units that can't be default
@@ -242,6 +247,14 @@ var (
 		4,
 	}
 
+	UnitProjects = Unit{
+		UnitTypeProjects,
+		"repo.projects",
+		"/projects",
+		"repo.projects.desc",
+		5,
+	}
+
 	// Units contains all the units
 	Units = map[UnitType]Unit{
 		UnitTypeCode:            UnitCode,
@@ -251,6 +264,7 @@ var (
 		UnitTypeReleases:        UnitReleases,
 		UnitTypeWiki:            UnitWiki,
 		UnitTypeExternalWiki:    UnitExternalWiki,
+		UnitTypeProjects:        UnitProjects,
 	}
 )