Add Plan Tracker Adaptive Card Extension solution

[ahmad-jad-alhak]

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Q	A
Bug fix?	no
New feature?	no
New sample?	yes
Related issues?	fixes #X, partially #Y, mentioned in #Z

What's in this Pull Request?

Summary
This PR introduces the Plan Tracker, a SharePoint Framework (SPFx) Adaptive Card Extension (ACE) designed to enhance task management by integrating with Microsoft Planner using the chart card

Features
Interactive and visually structured dashboard for Planner plans
Displays:
Buckets
Tasks (with sorting by priority or due date)
Project members
User’s personal assignments
Visual indicators for task status and due dates
Inline navigation for smoother user experience
High-level plan insights to support better project tracking

[anoopt]

Thank you @ahmad-jad-alhak for this pull request.

Can you please do a demo of this in a community call by filling in this form? - https://aka.ms/community/request/demo