Tag aliases (#1412)

* Add Tag Update/UpdateFull
* Tag alias implementation
* Refactor tag page
* Add aliases in UI
* Include tag aliases in q filter
* Include aliases in tag select
* Add aliases to auto-tagger
* Use aliases in scraper
* Add tag aliases for filename parser

pkg/database/database.go

@@ -23,7 +23,7 @@ import (
 var DB *sqlx.DB
 var WriteMu *sync.Mutex
 var dbPath string
-var appSchemaVersion uint = 23
+var appSchemaVersion uint = 24
 var databaseSchemaVersion uint
 
 var (

pkg/database/migrations/24_tag_aliases.up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE `tag_aliases` (
+  `tag_id` integer,
+  `alias` varchar(255) NOT NULL,
+  foreign key(`tag_id`) references `tags`(`id`) on delete CASCADE
+);
+
+CREATE UNIQUE INDEX `tag_aliases_alias_unique` on `tag_aliases` (`alias`);