chore: add iterator feature

[shiki-tak]

Description

I added iterator feature for simapp

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

[zemyblue]

Please add changelog.

[codecov]

Codecov Report

Merging #620 (d7477ea) into main (7b64b7a) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

❗ Current head d7477ea differs from pull request most recent head 2d0c361. Consider uploading reports for the commit 2d0c361 to get more accurate results

@@            Coverage Diff             @@
##             main     #620      +/-   ##
==========================================
- Coverage   59.72%   59.70%   -0.03%     
==========================================
  Files         811      811              
  Lines       94491    94491              
==========================================
- Hits        56438    56414      -24     
- Misses      34602    34630      +28     
+ Partials     3451     3447       -4     

Impacted Files	Coverage Δ
simapp/app.go	87.82% <100.00%> (ø)
x/foundation/authz.go	80.00% <0.00%> (-20.00%)	⬇️
x/token/validation.go	72.72% <0.00%> (-16.37%)	⬇️
x/foundation/foundation.go	70.75% <0.00%> (-3.98%)	⬇️
x/token/msgs.go	32.48% <0.00%> (-2.04%)	⬇️
x/collection/msgs.go	34.81% <0.00%> (-0.93%)	⬇️
crypto/keys/internal/ecdsa/privkey.go	84.21% <0.00%> (+1.75%)	⬆️
x/foundation/msgs.go	42.30% <0.00%> (+2.88%)	⬆️