feat: make purchase invoice from irn

[Sanket322]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 19.00826% with 98 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.89%. Comparing base (589b19c) to head (1386dda).
⚠️ Report is 1097 commits behind head on develop.

Files with missing lines	Patch %	Lines
...compliance/gst_india/overrides/purchase_invoice.py	19.49%	95 Missing ⚠️
...dia/doctype/e_invoice_mapping/e_invoice_mapping.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2630      +/-   ##
===========================================
+ Coverage    60.05%   60.89%   +0.84%     
===========================================
  Files          120      120              
  Lines        11572    11626      +54     
===========================================
+ Hits          6949     7080     +131     
+ Misses        4623     4546      -77     

Files with missing lines	Coverage Δ
...ia_compliance/gst_india/constants/custom_fields.py	100.00% <ø> (ø)
india_compliance/hooks.py	100.00% <ø> (ø)
...dia/doctype/e_invoice_mapping/e_invoice_mapping.py	0.00% <0.00%> (ø)
...compliance/gst_india/overrides/purchase_invoice.py	44.26% <19.49%> (-23.46%)	⬇️

... and 5 files with indirect coverage changes

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[ljain112]

Not required right now.
Will revisit in future.