Refactoring azure pipeline

[NavneetThekkumpat]

Creating targets solution and cleaning up pipeline

updated readme

Checklist

• [x] I have performed end-to-end test locally.
• [x] Existing unit tests pass locally with my changes
• [x] My changes generate no new warnings
• [x] I used clear names for everything
• [x] I have performed a self-review of my own code

[github-actions[bot]]

Package	Line Rate	Branch Rate	Complexity	Health
Microsoft.PowerApps.TestEngine	91%	88%	817	✔
Summary	91% (2160 / 2381)	88% (497 / 562)	817	✔

Minimum allowed line rate is 50%