Beelert 1.3.3

Changes:
- Added a dismiss button under the alert
- Clicking it snoozes the warning for 5 minutes
- Button text shows the snooze countdown
- Includes built-in fallback icon for compatibility

To use a custom image later:
1. Put bee-warning.tga into the Media folder
2. Change this line in Beelert.lua:
   warning.image:SetTexture("Interface\\Icons\\INV_Misc_QuestionMark")
   to:
   warning.image:SetTexture("Interface\\AddOns\\Beelert\\Media\\bee-warning.tga")
