feat(openapi): generate openapi.yml with Ignite CLI for use with Swagger

[Unique-Divine]

Purpose

• Closes docs: generate vuejs openapi docs for the chain #761 (mostly). Technically, this just creates the Open API spec, but that's the tricky part of the ticket

For Review

Just run

bash tools/ignite-openapi.sh

and you should get an output like so:

✅ Success: symlinked config
Checking chain config file:
✔ config file OK
Checking dependency tools:
✔ tools/tools.go exists
✔ tools file OK
✔ Generated OpenAPI spec
⋆ OpenAPI path: /home/realu/warpath/NibiruChain/nibiru/dist/openapi.yml
✅ Success: Completed generation of OpenAPI spec

Note that the output file is more than 27,000 lines long, so we shouldn't commit it.

[codecov]

Codecov Report

Merging #1651 (1d6b50a) into master (562209b) will increase coverage by 0.08%.
Report is 2 commits behind head on master.
The diff coverage is 85.61%.

@@            Coverage Diff             @@
##           master    #1651      +/-   ##
==========================================
+ Coverage   74.23%   74.31%   +0.08%     
==========================================
  Files         183      191       +8     
  Lines       14977    15079     +102     
==========================================
+ Hits        11118    11206      +88     
- Misses       3229     3243      +14     
  Partials      630      630              

Files	Coverage Δ
app/app.go	57.60% <100.00%> (+0.46%)	⬆️
app/keepers.go	99.20% <100.00%> (ø)
wasmbinding/exec_perp.go	90.74% <100.00%> (ø)
wasmbinding/stargate_query.go	100.00% <100.00%> (ø)
wasmbinding/wasm.go	100.00% <100.00%> (ø)
x/epochs/keeper/grpc_query.go	100.00% <100.00%> (ø)
x/perp/v2/keeper/keeper.go	96.66% <100.00%> (+0.11%)	⬆️
x/perp/v2/keeper/settlement.go	77.41% <ø> (+0.69%)	⬆️
x/perp/v2/types/genesis.go	85.36% <100.00%> (ø)
x/devgas/v1/types/export.go	0.00% <0.00%> (ø)
... and 7 more

[Unique-Divine]

This is a symlink. Git has a special way of representing these.

[Unique-Divine]

This is auto-generated by ignite CLI