Custom Color Specification Based on Project Type

Summary: Enhance project visualization by introducing the ability to assign custom colors to projects, tasks, and milestones based on their Project Type. The selected colors should be reflected in both the project table view and the GANTT plugin for improved clarity and visual distinction.

Details:

1. Color Customization:
• In the Project Type definition, alongside the Name and Comments fields, add three color pickers labeled "Project color," "Task color," and "Milestone color."
  
2. Table View Enhancement:
• Display the selected "Project color" in the project table view, surrounding the type of the project, similar to the display of Project Priority.
  
3. GANTT Plugin Integration:
• Utilize all three colors in the GANTT plugin view: "Project color" on the project bar, "Task color" on the task bar, and "Milestone color" on the milestone symbol.