feat(anir-wizard): streamline OAuth integration and enhance SharePoint configuration

• Updated OAuth flow to connect accounts directly via n8n without popups, improving user experience.
• Refactored SharePoint configuration to handle metadata updates more efficiently and avoid unnecessary re-renders.
• Enhanced documentation to reflect changes in the OAuth process and updated component comments for clarity.

Modified files:

• src/shared/api/endpoints/core-n8n-service/credential-endpoints.ts
• src/shared/api/stores/core-n8n-service/oauth-store.ts
• src/shared/components/wizard/anir-wizard/google-drive-connection-card.tsx
• src/shared/components/wizard/anir-wizard/sharepoint-config.tsx
• src/shared/components/wizard/anir-wizard/README.md
• .gitignore