feat: add disable conflicting bookings option for event types

[krakenftw]

What does this PR do?

• Fixes [CAL-5139] Setting to disable conflict checking #19179 (GitHub issue number)
• Fixes CAL-5139 (Linear issue number - should be visible at the bottom of the GitHub issue description)

Visual Demo (For contributors especially)

A visual demonstration is strongly recommended, for both the original and new change (video / image - any one).

Video Demo (if applicable):

• Show screen recordings of the issue or feature.
• Demonstrate how to reproduce the issue, the behavior before and after the change.

Image Demo (if applicable):

- Add side-by-side screenshots of the original and updated change. - Highlight any significant change(s).

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. If N/A, write N/A here and check the checkbox.
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

• Are there environment variables that should be set?
• What are the minimal test data to have?
• What is expected (happy path) to have (input and output)?
• Any other important info that could help to test that PR

Checklist

• I haven't read the contributing guide
• My code doesn't follow the style guidelines of this project
• I haven't commented my code, particularly in hard-to-understand areas
• I haven't checked if my changes generate no new warnings

[vercel]

@krakenftw is attempting to deploy a commit to the cal Team on Vercel.

A member of the Team first needs to authorize it.

[krakenftw]

WIP, let me know if i am missing something important.

[krakenftw]

@CarinaWolli

[graphite-app]

Graphite Automations

"Add consumer team as reviewer" took an action on this PR • (03/05/25)

1 reviewer was added to this PR based on Keith Williams's automation.

"Add community label" took an action on this PR • (03/05/25)

1 label was added to this PR based on Keith Williams's automation.

[github-actions]

This PR is being marked as stale due to inactivity.