feat: 'Invoice Number' field in Opening Invoice Creation Tool

[nemesis189]

Description:

• A field to store the Invoice Number of the invoices being imported in the Open Invoice Creation Tool has been added
• If the field has a name the invoice created will have that name instead of the conventional naming series stored in ERPNext
• If empty the series is continued from the last invoice of the series

Field is populated:

Field is empty:

Steps:

1. Open Opening Invoice Creation Tool
2. Select a Company and Type of invoice, in this case - Sales
3. Add row in Items table with a customer, outstanding amount and add the invoice name after expanding the row
4. Check the newly created invoice in sales invoice list

docs: https://docs.erpnext.com/docs/v13/user/manual/en/accounts/articles/opening-invoice-creation-tool

[codecov]

Codecov Report

Merging #28844 (dd33c95) into develop (9a644f6) will increase coverage by 8.73%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop   #28844      +/-   ##
===========================================
+ Coverage    46.80%   55.53%   +8.73%     
===========================================
  Files         1122     1125       +3     
  Lines        66777    66987     +210     
===========================================
+ Hits         31255    37202    +5947     
+ Misses       35522    29785    -5737     

Impacted Files	Coverage Δ
...ice_creation_tool/opening_invoice_creation_tool.py	61.64% <100.00%> (+0.80%)	⬆️
...nts/doctype/accounts_settings/accounts_settings.py	97.50% <0.00%> (-2.50%)	⬇️
.../hr/doctype/upload_attendance/upload_attendance.py	44.69% <0.00%> (-1.52%)	⬇️
...next/accounts/doctype/subscription/subscription.py	81.74% <0.00%> (-0.57%)	⬇️
erpnext/hooks.py	0.00% <0.00%> (ø)
erpnext/regional/saudi_arabia/setup.py	0.00% <0.00%> (ø)
...next/support/report/issue_summary/issue_summary.py	0.00% <0.00%> (ø)
...xt/setup/setup_wizard/operations/defaults_setup.py	0.00% <0.00%> (ø)
.../report/accounts_receivable/accounts_receivable.py	68.37% <0.00%> (ø)
.../report/tds_payable_monthly/tds_payable_monthly.py	0.00% <0.00%> (ø)
... and 197 more

[nextchamp-saqib]

set_child_names is True by default

[harshit-30]

@nemesis189 the Invoice Number field should be visible in the grid view of the table. Inserting every invoice by opening the child table is not very intuitive.

Cc. @nextchamp-saqib

[nemesis189]

@nemesis189 the Invoice Number field should be visible in the grid view of the table. Inserting every invoice by opening the child table is not very intuitive.

Cc. @nextchamp-saqib

Done.
PR: #28938