Implement support for true/false permission requirements in FancyDialog

[Furqit]

📋 Description

This PR adds support for configuring the expected value of a permission requirement in FancyDialog.

Previously, permission requirements always checked whether the player had the specified permission. This change adds an optional value field, allowing requirements to check whether a player has or does not have a permission.

If value is not specified, it defaults to true, preserving the existing behavior.

🔍 Changes

• Added an optional value field to permission requirements
• value: true requires the player to have the permission
• value: false requires the player to not have the permission
• Defaults to true when value is not specified
• Updated the permission requirement check to compare the player's permission status against the expected value

🧪 How to Test

1. Create a permission requirement without specifying value.
2. Verify it passes when the player has the required permission.
3. Set value: true and verify it still passes when the player has the permission.
4. Set value: false and verify it passes when the player does not have the permission.
5. Verify that value: false fails when the player does have the permission.