add db connection, refactor code, add db migration files

db/migrations/000001_create_foundry_state.up.sql

@@ -0,0 +1,15 @@
+CREATE TABLE IF NOT EXISTS foundry_state (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    is_admin BOOLEAN NOT NULL DEFAULT FALSE,
+    is_setup BOOLEAN NOT NULL DEFAULT TRUE,
+    state_type INTEGER NOT NULL,
+
+    created_at DATETIME NOT NULL DEFAULT current_timestamp
+);
+
+CREATE TABLE IF NOT EXISTS options (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    state_id INTEGER UNIQUE,
+    lang TEXT NOT NULL,
+    FOREIGN KEY (state_id) REFERENCES foundry_state(id) ON DELETE CASCADE
+);