refactor: ERPNext integration ui

[pratikb64]

Refactor ERPNext integration ui to make it more intuitive and user-friendly

Fixes: #1673

[codecov]

Codecov Report

❌ Patch coverage is 40.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.12%. Comparing base (1430f03) to head (182c1c2).
⚠️ Report is 29 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ctype/erpnext_crm_settings/erpnext_crm_settings.py	40.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1786      +/-   ##
===========================================
- Coverage    62.14%   62.12%   -0.03%     
===========================================
  Files          122      122              
  Lines         6988     6997       +9     
===========================================
+ Hits          4343     4347       +4     
- Misses        2645     2650       +5     

Files with missing lines	Coverage Δ
...ctype/erpnext_crm_settings/erpnext_crm_settings.py	22.28% <40.00%> (+1.20%)	⬆️

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