feat: add configuration file strategy

src/types/cli.types.ts

@@ -10,4 +10,27 @@ export interface CliOptions {
   dryRun?: boolean;
   selectEndpoints?: boolean;
   skipLint?: boolean;
+  config?: string;
+  initConfig?: string | boolean;
+}
+
+/**
+ * Per-tag configuration inside the generation config file.
+ */
+export interface TagConfig {
+  baseUrl: string;
+  endpoints: string[];
+}
+
+/**
+ * JSON configuration file schema.
+ * Allows full non-interactive control of the generation process.
+ */
+export interface GenerationConfig {
+  input: string;
+  output: string;
+  templates?: string;
+  skipInstall?: boolean;
+  skipLint?: boolean;
+  tags: Record<string, TagConfig>;
 }