refactor: duplicate ibc-core to ibc-eureka-core

[rnbguy]

Closes: #1366

Description

For now, we decided to duplicate the ibc-core packages and rename to ibc-eureka-core and modify for eureka spec.

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PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[codecov]

Codecov Report

Attention: Patch coverage is 26.23370% with 6054 lines in your changes missing coverage. Please review.

Project coverage is 56.03%. Comparing base (cdd4625) to head (70e5b63).

Files with missing lines	Patch %	Lines
...-eureka-core/ics04-channel/types/src/events/mod.rs	35.86%	515 Missing ⚠️
ibc-eureka-core/ics04-channel/types/src/channel.rs	0.00%	330 Missing ⚠️
...reka-core/ics03-connection/types/src/connection.rs	0.00%	292 Missing ⚠️
ibc-eureka-core/ics24-host/types/src/path.rs	63.59%	269 Missing ⚠️
ibc-eureka-core/ics02-client/types/src/events.rs	52.83%	191 Missing ⚠️
...reka-core/ics04-channel/src/handler/recv_packet.rs	0.00%	188 Missing ⚠️
...c-eureka-core/ics04-channel/src/handler/timeout.rs	0.00%	174 Missing ⚠️
ibc-eureka-core/ics04-channel/types/src/packet.rs	0.00%	163 Missing ⚠️
...core/ics03-connection/src/handler/conn_open_try.rs	0.00%	146 Missing ⚠️
...c-eureka-core/ics23-commitment/types/src/merkle.rs	0.00%	146 Missing ⚠️
... and 78 more

Additional details and impacted files

@@                 Coverage Diff                  @@
##           feat/ibc-eureka    #1369       +/-   ##
====================================================
- Coverage            66.84%   56.03%   -10.81%     
====================================================
  Files                  225      315       +90     
  Lines                22631    30838     +8207     
====================================================
+ Hits                 15127    17280     +2153     
- Misses                7504    13558     +6054     

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