[Feat] Implement Task Priority

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**Is your feature request related to a problem? Please describe.**
Currently, there is no clear way to differentiate tasks based on their importance or urgency. Without task prioritization, users may find it difficult to manage their tasks efficiently, especially when dealing with multiple tasks that need attention.

**Describe the solution you'd like**
Implement a priority system for tasks that allows users to assign a priority level (e.g., High, Medium, Low) to each task.
Display tasks in priority order, with high-priority tasks appearing at the top of the task list.
Allow users to set or change the priority of a task when creating or editing a task.
Optionally, use color coding or icons (e.g., red for high priority, yellow for medium, and green for low) to visually distinguish tasks based on their priority.

**Additional context**
Allow users to select the priority level when creating or editing a task via a dropdown or a set of radio buttons.
Ensure that tasks are dynamically reordered when the priority level is changed.

Start by tracing the task creation and editing flows and the task-list UI. Add selectable High, Medium, and Low priority values, show tasks in priority order, and confirm that changing a priority reorders the list and that the priority is visually distinguishable.

Written by the indexing model from the issue text.