Promotion Detail view implement

[Kamikuz]

• Admin can update the promotion info
• Can revoke the promotion
• Can remove the promotion
• Can bind and unbind the product if needed

[codecov[bot]]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (deca87e) 94.77% compared to head (917e57a) 96.64%.

Files	Patch %	Lines
service/models.py	88.00%	3 Missing :warning:
service/routes.py	98.63%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #72 +/- ## ========================================== + Coverage 94.77% 96.64% +1.87% ========================================== Files 8 8 Lines 459 537 +78 ========================================== + Hits 435 519 +84 + Misses 24 18 -6 ```

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[sashadsouza02]

Looks good!