feat(platforms): added platform support (#67)

Now libraries can be assigned to platforms in the admin section.
Games will be assigned to libraries on scanning.

Resolves grimsi/gameyfin#31

Co-authored-by: shawly <shawlyde@gmail.com>

backend/src/main/resources/db/migration/V1_3_0__Add_Platforms_to_Detected_Game.sql

@@ -0,0 +1,45 @@
+-- Add platforms
+
+-- Platforms
+CREATE TABLE platform
+(
+    slug VARCHAR(255) NOT NULL,
+    name VARCHAR(255),
+    logo_id VARCHAR(255),
+    PRIMARY KEY (slug)
+);
+
+-- Game <-> Platforms
+CREATE TABLE detected_game_platforms
+(
+    detected_game_slug VARCHAR(255) NOT NULL,
+    platforms_slug     VARCHAR(255) NOT NULL
+);
+ALTER TABLE detected_game_platforms
+    ADD CONSTRAINT platforms_platform_slug FOREIGN KEY (platforms_slug) REFERENCES platform;
+ALTER TABLE detected_game_platforms
+    ADD CONSTRAINT platforms_detected_game_slug FOREIGN KEY (detected_game_slug) REFERENCES detected_game;
+
+-- Add libraries
+
+-- Libraries
+CREATE TABLE library
+(
+    path VARCHAR(255) NOT NULL,
+    PRIMARY KEY (path)
+);
+
+-- Library <-> Platforms
+CREATE TABLE library_platforms
+(
+    library_path   VARCHAR(255) NOT NULL,
+    platforms_slug VARCHAR(255) NOT NULL
+);
+ALTER TABLE library_platforms
+    ADD CONSTRAINT libraries_platform_slug FOREIGN KEY (platforms_slug) REFERENCES platform;
+ALTER TABLE library_platforms
+    ADD CONSTRAINT libraries_library_path FOREIGN KEY (library_path) REFERENCES library;
+
+-- Library <-> Game
+ALTER TABLE detected_game
+    ADD library VARCHAR(255);