feat: icon cluster connection

[bcsainju]

Description:

Added cluster connection contract for icon chains

Commit Message

type: commit message

see the guidelines for commit messages.

Changelog Entry

version: <log entry>

Checklist:

• [x] 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
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] 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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.47%. Comparing base (4e08258) to head (d7f11de). Report is 3 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/icon-project/xcall-multi/pull/386?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=icon-project) ```diff @@ Coverage Diff @@ ## main #386 +/- ## ========================================= Coverage 89.47% 89.47% Complexity 77 77 ========================================= Files 42 42 Lines 2698 2698 Branches 37 37 ========================================= Hits 2414 2414 Misses 267 267 Partials 17 17 ``` | [Flag](https://app.codecov.io/gh/icon-project/xcall-multi/pull/386/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=icon-project) | Coverage Δ | | |---|---|---| | [java](https://app.codecov.io/gh/icon-project/xcall-multi/pull/386/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=icon-project) | `85.60% <ø> (ø)` | | | [solidity](https://app.codecov.io/gh/icon-project/xcall-multi/pull/386/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=icon-project) | `88.41% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=icon-project#carryforward-flags-in-the-pull-request-comment) to find out more.