New bounty form

[octavioamu]

Description

• Adds new funder form
• Introduce subscriptions model

The new funder form was rebuild from zero removing standard bounties but keeping 10% fees and featured bounty.
For non ethereum 10% fees are not applied, but if the bounty is featured then user need to do that transaction.

Guide was moved to a modal, no longer redirect.

Subscribers doesn't have any charge on fees or featured bounties.

Coupons still a valid use case.

Chains selectors let people chose their chain.

Contest and cooperative only for subscriptions.

paypal, others, celo only visible for staff.

new param for get_issue_details duplicates=true to check if there is a bounty already for that issue.
/sync/get_issue_details?url=https://github.com/gitcoinco/web/issues/7111&duplicates=true

Refers/Fixes

Testing

[PixelantDesign]

Is there a video @octavioamu ?

[codecov]

Codecov Report

Merging #7086 into stable will decrease coverage by 0.18%.
The diff coverage is 48.14%.

@@            Coverage Diff             @@
##           stable    #7086      +/-   ##
==========================================
- Coverage   26.25%   26.06%   -0.19%     
==========================================
  Files         300      300              
  Lines       29385    29769     +384     
  Branches     4325     4497     +172     
==========================================
+ Hits         7715     7760      +45     
- Misses      21399    21729     +330     
- Partials      271      280       +9     

Impacted Files	Coverage Δ
app/dashboard/helpers.py	14.28% <0.00%> (-0.19%)	⬇️
app/dashboard/views.py	10.40% <0.00%> (-0.17%)	⬇️
app/dashboard/models.py	48.61% <60.00%> (+0.07%)	⬆️
app/dashboard/admin.py	60.59% <100.00%> (+0.39%)	⬆️
app/dashboard/tip_views.py	13.71% <0.00%> (-0.46%)	⬇️
app/quests/views.py	16.22% <0.00%> (ø)
...rketing/management/commands/no_applicants_email.py	0.00% <0.00%> (ø)
...eting/management/commands/assemble_leaderboards.py	39.73% <0.00%> (ø)

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