feat: support message based proposals (backport #1372)

[mergify]

Description

closes: #XXXX

Motivation and context

How has this been tested?

Screenshots (if appropriate):

Checklist:

• I followed the contributing guidelines and code of conduct.
• I have added a relevant changelog to CHANGELOG.md
• I have added tests to cover my changes.
• I have updated the documentation accordingly.
• I have updated API documentation client/docs/swagger-ui/swagger.yaml

---

This is an automatic backport of pull request #1372 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 97570b2 has failed:

On branch mergify/bp/release/v0.49.x/pr-1372
Your branch is up to date with 'origin/release/v0.49.x'.

You are currently cherry-picking commit 97570b2d5.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   CHANGELOG.md
	modified:   docs/core/proto-docs.md
	modified:   proto/lbm/fswap/v1/fswap.proto
	modified:   proto/lbm/fswap/v1/tx.proto
	modified:   simapp/app.go
	modified:   x/fswap/client/cli/tx.go
	deleted:    x/fswap/client/proposal_handler.go
	deleted:    x/fswap/codec/codec.go
	deleted:    x/fswap/handler.go
	modified:   x/fswap/keeper/keeper.go
	modified:   x/fswap/keeper/keeper_test.go
	modified:   x/fswap/keeper/msg_server.go
	modified:   x/fswap/keeper/msg_server_test.go
	deleted:    x/fswap/keeper/proposal_test.go
	deleted:    x/fswap/proposal_handler_test.go
	modified:   x/fswap/types/codec.go
	modified:   x/fswap/types/fswap.go
	modified:   x/fswap/types/fswap.pb.go
	modified:   x/fswap/types/genesis.go
	modified:   x/fswap/types/msgs.go
	deleted:    x/fswap/types/proposal.go
	modified:   x/fswap/types/tx.pb.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by them: x/fswap/keeper/proposal.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[codecov]

Codecov Report

Attention: Patch coverage is 38.50267% with 115 lines in your changes are missing coverage. Please review.

Project coverage is 68.87%. Comparing base (defb3ad) to head (f13f678).
Report is 1 commits behind head on release/v0.49.x.

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v0.49.x    #1373   +/-   ##
================================================
  Coverage            68.86%   68.87%           
================================================
  Files                  675      671    -4     
  Lines                69204    69197    -7     
================================================
- Hits                 47660    47657    -3     
+ Misses               19264    19260    -4     
  Partials              2280     2280           

Files	Coverage Δ
simapp/app.go	82.23% <100.00%> (-0.05%)	⬇️
x/fswap/types/fswap.go	4.76% <ø> (+0.84%)	⬆️
x/fswap/types/codec.go	57.89% <88.88%> (+17.89%)	⬆️
x/fswap/types/genesis.go	25.00% <0.00%> (-7.00%)	⬇️
x/fswap/keeper/msg_server.go	43.18% <0.00%> (-12.71%)	⬇️
x/fswap/types/msgs.go	0.00% <0.00%> (ø)
x/fswap/keeper/keeper.go	46.57% <44.92%> (-2.01%)	⬇️

... and 2 files with indirect coverage changes

[zemyblue]

@jaeseung-bae , please check lint ci error.

[jaeseung-bae]

@jaeseung-bae , please check lint ci error.

I've checked. This branch use different lint version(v3) to main's one(v6).
I could fix it but code will be different to code in original PR.

[zemyblue]

@jaeseung-bae , please check lint ci error.

I've checked. This branch use different lint version(v3) to main's one(v6). I could fix it but code will be different to code in original PR.

I think this is a problem pr. #1355 :)

How about pushing and completing PR whitch matches the lint version first and then solving this?

[zemyblue]

Oh. #1374 PR is registered.

[zemyblue]

If we want to fix golang-lint error, we need to modify the golangci setting of this file. https://github.com/Finschia/finschia-sdk/blob/release/v0.49.x/.golangci.yml

Let's fix it later PR.