feat(coderd): allow workspace owners to mark workspaces as favorite (#11791)

- Adds column `favorite` to workspaces table
- Adds API endpoints to favorite/unfavorite workspaces
- Modifies sorting order to return owners' favorite workspaces first

coderd/database/models.go

@@ -2185,6 +2185,8 @@ type Workspace struct {
 	DormantAt         sql.NullTime     `db:"dormant_at" json:"dormant_at"`
 	DeletingAt        sql.NullTime     `db:"deleting_at" json:"deleting_at"`
 	AutomaticUpdates  AutomaticUpdates `db:"automatic_updates" json:"automatic_updates"`
+	// Favorite is true if the workspace owner has favorited the workspace.
+	Favorite bool `db:"favorite" json:"favorite"`
 }
 
 type WorkspaceAgent struct {