fix(receipts): Remove purchase receipt view & refactor payment status display

[marfavi]

Closes #477.

• PurchaseReceiptListEntry widget now has 'tappable' set to false, disabling purchase receipts.
• Timestamp has been added below the purchase/swipe status in ReceiptListEntry.
• Updated PaymentStatus string values to provide clearer descriptions.
• Renamed 'purchaseStatus' field to 'status' across multiple generic receipt widgets.
• Refactored PurchaseReceiptListEntry to show price differently (or hide it), based on status.
• misc: Updated _formatter to _formatDate/_formatDateTime in ReceiptListEntry and ReceiptCard.
• misc: Removed rounded edges from ReceiptListEntry.

[ghost]

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#### [](https://app.codesee.io/r/reviews?pr=478&src=https%3A%2F%2Fgithub.com%2FAnalogIO%2Fcoffeecard_app) #### Legend

[codecov[bot]]

Codecov Report

Merging #478 (e9e0cb1) into develop (75a22dc) will increase coverage by 0.08%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #478      +/-   ##
===========================================
+ Coverage    67.76%   67.85%   +0.08%     
===========================================
  Files          101      101              
  Lines         1120     1120              
===========================================
+ Hits           759      760       +1     
+ Misses         361      360       -1     

Flag	Coverage Δ
unittests	67.85% <100.00%> (+0.08%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...tures/purchase/domain/entities/payment_status.dart	69.23% <100.00%> (+7.69%)	:arrow_up: