feat: icon bridge migration

[izyak]

Closes #ISSUE-NUMBER

Checklist:

• I have performed a self-review of my own code
• I have documented my code in accordance with the documentation guidelines
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have run the unit tests
• I only have one commit (if not, squash them into one commit).
• I have a descriptive commit message that adheres to the commit message guidelines

Please review the CONTRIBUTING.md file for detailed contributing guidelines.

[codecov]

Codecov Report

Attention: Patch coverage is 3.03030% with 192 lines in your changes are missing coverage. Please review.

Project coverage is 33.45%. Comparing base (43e7ce3) to head (244cea6).
Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #872      +/-   ##
============================================
- Coverage     36.39%   33.45%   -2.94%     
+ Complexity      811      748      -63     
============================================
  Files           125      127       +2     
  Lines         12061    12458     +397     
  Branches       1091     1216     +125     
============================================
- Hits           4389     4168     -221     
- Misses         7332     7953     +621     
+ Partials        340      337       -3     

Files	Coverage Δ
solidity/bts/contracts/BTSCore.sol	8.37% <0.00%> (+0.12%)	⬆️
.../java/foundation/icon/btp/bts/BTPTokenService.java	57.50% <31.57%> (-25.48%)	⬇️
solidity/bts/contracts/BTSCoreV5.sol	0.00% <0.00%> (ø)

... and 7 files with indirect coverage changes