feat: IMAP Driver Integration (#12576)

### Added IMAP integration 

This PR adds support for connecting email accounts via IMAP protocol,
allowing users to sync their emails without OAuth.

#### DB Changes:
- Added customConnectionParams and connectionType fields to
ConnectedAccountWorkspaceEntity

#### UI:
- Added settings pages for creating and editing IMAP connections with
proper validation and connection testing.
- Implemented reconnection flows for handling permission issues.

#### Backend:
- Built ImapConnectionModule with corresponding resolver and service for
managing IMAP connections.
- Created MessagingIMAPDriverModule to handle IMAP client operations,
message fetching/parsing, and error handling.

#### Dependencies:
Integrated `imapflow` and `mailparser` libraries with their type
definitions to handle the IMAP protocol communication.

---------

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>
Co-authored-by: Félix Malfait <felix@twenty.com>

packages/twenty-server/src/engine/core-modules/twenty-config/config-variables.ts

@@ -143,6 +143,13 @@ export class ConfigVariables {
   })
   MESSAGING_PROVIDER_GMAIL_ENABLED = false;
 
+  @ConfigVariablesMetadata({
+    group: ConfigVariablesGroup.Other,
+    description: 'Enable or disable the IMAP messaging integration',
+    type: ConfigVariableType.BOOLEAN,
+  })
+  MESSAGING_PROVIDER_IMAP_ENABLED = false;
+
   @ConfigVariablesMetadata({
     group: ConfigVariablesGroup.MicrosoftAuth,
     description: 'Enable or disable Microsoft authentication',