Feature: Add Bug Resolution Milestone Tracking

[TomHacker69]

Description

Teams often fix bugs as part of project milestones or sprints.

Associating bugs with milestones improves release planning.

Proposed Solution

Allow bugs to be assigned to milestones and monitor progress.

Suggested Changes

• Milestone assignment
• Progress bar
• Completion percentage
• Milestone dashboard
• Overdue milestones
• Filters

Expected Outcome

Improved sprint planning and release visibility.

Suggested Labels

• enhancement
• project-management
• feature