feat: added database migration on startup and user+list db migrations

internal/database/migrations/000002_create_lists.up.sql

@@ -0,0 +1,26 @@
+CREATE TABLE IF NOT EXISTS lists (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name VARCHAR(255) NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    modified_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS list_users (
+    list_id UUID REFERENCES lists(id) ON DELETE CASCADE,
+    user_id UUID NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    PRIMARY KEY (list_id, user_id)
+);
+
+CREATE INDEX idx_list_users_user_id ON list_users(user_id);
+
+CREATE TABLE IF NOT EXISTS list_items (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    list_id UUID REFERENCES lists(id) ON DELETE CASCADE,
+    title VARCHAR(255) NOT NULL,
+    is_completed BOOLEAN NOT NULL DEFAULT FALSE,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    modified_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_list_items_list_id ON list_items(list_id);