Add OpenAI and PostgreSQL credential management

- Implemented OpenAICredencial class for managing OpenAI API keys.
- Created OpenAICredencialModel and OpenAICredencialMapper for SQLAlchemy integration.
- Developed OpenAICredencialRepo for CRUD operations on OpenAI credentials.
- Established OpenAICliente class for interacting with OpenAI API.
- Introduced PostgresCredencial class for managing PostgreSQL connection details.
- Created PostgresCredencialModel and PostgresCredencialMapper for SQLAlchemy integration.
- Developed PostgresCredencialRepo for CRUD operations on PostgreSQL credentials.
- Added base connection class and PostgreSQL connection implementation.
- Included environment variable loading for sensitive data management.

frontend/.storybook/main.ts

@@ -0,0 +1,17 @@
+import type { StorybookConfig } from '@storybook/react-vite';
+
+const config: StorybookConfig = {
+  core: {
+    disableWhatsNewNotifications: true,
+    disableTelemetry: true,
+    enableCrashReports: false,
+  },
+  stories: ['../src/**/*.mdx', '../src/**/*.story.@(js|jsx|ts|tsx)'],
+  addons: ['storybook-dark-mode'],
+  framework: {
+    name: '@storybook/react-vite',
+    options: {},
+  },
+};
+
+export default config;