Implement priority levels for To-Do items

[MustaphaBakoji]

Overview
Currently, all tasks in the application are treated with equal importance. To help users manage their time more effectively, we need to implement a Priority Level system. This will allow users to categorize tasks based on urgency.

Proposed Changes
Data Model: Add a priority field to the Task schema.

Values: Low, Medium, High (Default: Medium).

UI/UX:

Add a dropdown or button toggle in the "Create/Edit Task" modal to select priority.

Add visual indicators (e.g., color-coded badges or icons) on the task list.

🔴 High: Red

🟡 Medium: Yellow/Orange

🔵 Low: Blue/Grey

Acceptance criteria
Users can select a priority level when creating a task.

Users can update the priority level of an existing task.