Task/FOUR-25961: Messages when Keys are not configured for Slack Integration

[CarliPinell]

Issue

This PR introduces specific messages to notify the user that Slack TOKENS need to be configured after Enable the Slack Notifications Toggle.

How to Test

Use Case 1:

1. Login as Admin User
2. Make sure there is no TOKENS configured in Environment Variables
3. Go to Icon in the top-right of the screen
4. Click on Edit Admin Profile
5. Go to Connected Accounts TAB
6. Click on "Send ProcessMaker notifications to Slack" toggle
7. A CARD with message: Slack API Keys required

Use Case 2:

1. Login as Participant or Designer User with permissions in Edit Profile
2. Make sure there is no TOKENS configured in Environment Variables
3. Go to Icon in the top-right of the screen
4. Click on Edit Participant/Designer Profile
5. Go to Connected Accounts TAB
6. Click on "Send ProcessMaker notifications to Slack" toggle
7. A CARD with message: Slack API Keys required

Related Tickets & Packages

https://processmaker.atlassian.net/browse/FOUR-25961

ci:connector-slack:task/FOUR-25961

[processmaker-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

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