add src/ikarus subdir and make names unique for objects per scope

Signed-off-by: Folling <mail@folling.io>

src/ikarus/persistence/migrations/m0_initial_layout.sql

@@ -0,0 +1,68 @@
+CREATE TABLE `objects`
+(
+    `do_not_access_rowid_alias` INTEGER PRIMARY KEY,
+    `type`                      INT NOT NULL,
+    `id`                        INT GENERATED ALWAYS AS (`do_not_access_rowid_alias` | (`type` << 56)) VIRTUAL UNIQUE
+) STRICT;
+
+CREATE UNIQUE INDEX `object_id` ON `objects` (`id`);
+CREATE INDEX `object_type` ON `objects` (`type`);
+
+CREATE TABLE `entities`
+(
+    `id`   INT,
+    `name` TEXT NOT NULL,
+
+    PRIMARY KEY (`id`),
+    UNIQUE (`name`),
+    FOREIGN KEY (`id`) REFERENCES `objects` (`id`) ON DELETE CASCADE
+) WITHOUT ROWID, STRICT;
+
+CREATE TABLE `blueprints`
+(
+    `id`   INT,
+    `name` TEXT NOT NULL,
+
+    PRIMARY KEY (`id`),
+    UNIQUE (`name`),
+    FOREIGN KEY (`id`) REFERENCES `objects` (`id`) ON DELETE CASCADE
+) WITHOUT ROWID, STRICT;
+
+CREATE TABLE `entity_blueprint_links`
+(
+    `entity`    INT NOT NULL,
+    `blueprint` INT NOT NULL,
+
+    PRIMARY KEY (`entity`, `blueprint`),
+    FOREIGN KEY (`entity`) REFERENCES `entities` (`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`blueprint`) REFERENCES `blueprints` (`id`) ON DELETE CASCADE
+) WITHOUT ROWID, STRICT;
+
+CREATE TABLE `properties`
+(
+    `id`            INT,
+    `name`          TEXT NOT NULL,
+    `type`          INT  NOT NULL,
+    `default_value` TEXT NOT NULL,
+    `settings`      TEXT NOT NULL,
+    `source`        INT  NOT NULL,
+
+    PRIMARY KEY (`id`),
+    UNIQUE(`source`, `name`),
+    FOREIGN KEY (`id`) REFERENCES `objects` (`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`source`) REFERENCES `objects` (`id`) ON DELETE CASCADE
+) WITHOUT ROWID, STRICT;
+
+CREATE INDEX `properties_type` ON `properties` (`type`);
+CREATE INDEX `properties_source` ON `properties` (`source`);
+
+CREATE TABLE `values`
+(
+    `entity`   INT  NOT NULL,
+    `property` INT  NOT NULL,
+    `value`    TEXT NOT NULL,
+
+    PRIMARY KEY (`entity`, `property`),
+    FOREIGN KEY (`entity`) REFERENCES `entities` (`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`property`) REFERENCES `properties` (`id`) ON DELETE CASCADE
+) WITHOUT ROWID, STRICT;