appview: adds stars as vanity stats

Signed-off-by: Eduardo Cuducos <[e-mail]>

appview/db/profile.go

···
 	case models.VanityStatRepositoryCount:
 		query = `select count(id) from repos where did = ?`
 		args = append(args, did)
+	case models.VanityStatStarCount:
+		query = `select count(id) from stars where did = ?`
+		args = append(args, did)
 	}
 
 	var result uint64

appview/models/profile.go

···
 	VanityStatOpenIssueCount   VanityStatKind = "open-issue-count"
 	VanityStatClosedIssueCount VanityStatKind = "closed-issue-count"
 	VanityStatRepositoryCount  VanityStatKind = "repository-count"
+	VanityStatStarCount        VanityStatKind = "star-count"
 )
 
 func (v VanityStatKind) String() string {
···
 		return "Closed Issues"
 	case VanityStatRepositoryCount:
 		return "Repositories"
+	case VanityStatStarCount:
+		return "Stars"
 	}
 	return ""
 }

lexicons/actor/profile.json

···
                 "open-pull-request-count",
                 "open-issue-count",
                 "closed-issue-count",
-                "repository-count"
+                "repository-count",
+                "star-count"
               ]
             }
           },