Text-to-SQL proof of concept (#5788)

Added:
- An "Ask AI" command to the command menu.
- A simple GraphQL resolver that converts the user's question into a
relevant SQL query using an LLM, runs the query, and returns the result.

<img width="428" alt="Screenshot 2024-06-09 at 20 53 09"
src="https://github.com/twentyhq/twenty/assets/171685816/57127f37-d4a6-498d-b253-733ffa0d209f">

No security concerns have been addressed, this is only a
proof-of-concept and not intended to be enabled in production.

All changes are behind a feature flag called `IS_ASK_AI_ENABLED`.

---------

Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-server/src/engine/core-modules/feature-flag/feature-flag.entity.ts

@@ -22,6 +22,7 @@ export enum FeatureFlagKeys {
   IsPostgreSQLIntegrationEnabled = 'IS_POSTGRESQL_INTEGRATION_ENABLED',
   IsStripeIntegrationEnabled = 'IS_STRIPE_INTEGRATION_ENABLED',
   IsContactCreationForSentAndReceivedEmailsEnabled = 'IS_CONTACT_CREATION_FOR_SENT_AND_RECEIVED_EMAILS_ENABLED',
+  IsCopilotEnabled = 'IS_COPILOT_ENABLED',
   IsMessagingAliasFetchingEnabled = 'IS_MESSAGING_ALIAS_FETCHING_ENABLED',
   IsGoogleCalendarSyncV2Enabled = 'IS_GOOGLE_CALENDAR_SYNC_V2_ENABLED',
   IsFreeAccessEnabled = 'IS_FREE_ACCESS_ENABLED',