p1: cross chain grants integration

[thelostone-mc]

Description

• splits code into multiple files within cart
• fixes up bugs in bounties sync logic
• updated backend + frontend to accommodate newer chains. starting with CELO + ZIL for starters

[codecov]

Codecov Report

Merging #8077 (492c73f) into master (5265bdb) will decrease coverage by 4.59%.
The diff coverage is 15.52%.

@@            Coverage Diff             @@
##           master    #8077      +/-   ##
==========================================
- Coverage   25.35%   20.76%   -4.60%     
==========================================
  Files         329      324       -5     
  Lines       33401    34130     +729     
  Branches     4997     5108     +111     
==========================================
- Hits         8470     7086    -1384     
- Misses      24641    26993    +2352     
+ Partials      290       51     -239     

Impacted Files	Coverage Δ
app/app/settings.py	81.35% <ø> (-0.06%)	⬇️
app/app/urls.py	86.20% <ø> (ø)
...d/management/commands/sync_pending_fulfillments.py	0.00% <0.00%> (ø)
app/dashboard/sync/btc.py	19.56% <0.00%> (ø)
app/dashboard/sync/celo.py	14.28% <0.00%> (ø)
app/dashboard/sync/etc.py	14.28% <0.00%> (ø)
app/dashboard/sync/filecoin.py	16.94% <0.00%> (ø)
app/dashboard/sync/zil.py	19.56% <0.00%> (ø)
app/dashboard/tip_views.py	14.85% <0.00%> (-0.06%)	⬇️
app/economy/tx.py	0.00% <0.00%> (-16.10%)	⬇️
... and 109 more

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[danlipert]

A couple of fun performance improvements, probably more lurking here

[amustapha]

A suggestion, why not merge the migrations 107/108

[thelostone-mc]

@aamustapha forgot to push that in ! nice catch