feat: new command for 3D dymint store migration

[srene]

PR Standards

Opening a pull request should be able to meet the following requirements

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PR naming convention: https://hackmd.io/@nZpxHZ0CT7O5ngTp0TP9mg/HJP_jrm7A

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Close #1301

<-- Briefly describe the content of this pull request -->

For Author:

• Targeted PR against correct branch
• included the correct type prefix in the PR title
• Linked to Github issue with discussion and accepted design
• Targets only one github issue
• Wrote unit and integration tests
• All CI checks have passed
• Added relevant godoc comments

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For Reviewer:

• confirmed the correct type prefix in the PR title
• Reviewers assigned
• confirmed all author checklist items have been addressed

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After reviewer approval:

• In case targets main branch, PR should be squashed and merged.
• In case PR targets a release branch, PR should be rebased.

[codecov]

Codecov Report

Attention: Patch coverage is 4.03226% with 119 lines in your changes missing coverage. Please review.

Project coverage is 17.29%. Comparing base (ed72d9b) to head (15e0ff2).
Report is 31 commits behind head on main.

Files with missing lines	Patch %	Lines
store/store.go	0.00%	61 Missing ⚠️
...github.heygears.com/dymensionxyz/dymint/store/mock_Store.go	0.00%	25 Missing ⚠️
cmd/dymint/commands/migration.go	0.00%	20 Missing ⚠️
...ub.com/dymensionxyz/dymint/block/mock_ExecutorI.go	0.00%	4 Missing ⚠️
...b.com/tendermint/tendermint/proxy/mock_AppConns.go	0.00%	2 Missing ⚠️
block/submit.go	50.00%	0 Missing and 1 partial ⚠️
cmd/dymint/commands/init.go	0.00%	1 Missing ⚠️
cmd/dymint/main.go	0.00%	1 Missing ⚠️
...com/dymensionxyz/dymint/block/mock_FraudHandler.go	0.00%	1 Missing ⚠️
...nxyz/dymint/da/mock_DataAvailabilityLayerClient.go	0.00%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1302      +/-   ##
==========================================
- Coverage   17.72%   17.29%   -0.44%     
==========================================
  Files         187      195       +8     
  Lines       55555    58975    +3420     
==========================================
+ Hits         9849    10201     +352     
- Misses      44182    47183    +3001     
- Partials     1524     1591      +67     

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[danwt]

nice job