refactor: evm folder structure

[redlarva]

Description:

Commit Message

refactor: evm folder structure

see the guidelines for commit messages.

Changelog Entry

version: <log entry>

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

Merging #143 (16c6fb2) into feature/add-evm-multi-protocol-xcall (b529488) will decrease coverage by 49.81%.
The diff coverage is 7.69%.

Additional details and impacted files

@@                            Coverage Diff                            @@
##           feature/add-evm-multi-protocol-xcall     #143       +/-   ##
=========================================================================
- Coverage                                 68.48%   18.67%   -49.81%     
=========================================================================
  Files                                         3       11        +8     
  Lines                                       165      605      +440     
=========================================================================
  Hits                                        113      113               
- Misses                                       52      492      +440     

Flag	Coverage Δ
solidity	18.67% <7.69%> (-49.81%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...racts/evm/contracts/mocks/dapp/DAppProxySample.sol	0.00% <ø> (ø)
contracts/evm/library/btp2/utils/Integers.sol	0.00% <ø> (ø)
...ontracts/evm/library/btp2/utils/NetworkAddress.sol	0.00% <ø> (ø)
contracts/evm/library/btp2/utils/ParseAddress.sol	0.00% <ø> (ø)
contracts/evm/library/btp2/utils/RLPDecode.sol	0.00% <ø> (ø)
contracts/evm/library/btp2/utils/RLPEncode.sol	0.00% <ø> (ø)
contracts/evm/library/btp2/utils/Strings.sol	0.00% <ø> (ø)
contracts/evm/library/utils/RLPDecodeStruct.sol	0.00% <ø> (ø)
contracts/evm/library/utils/RLPEncodeStruct.sol	0.00% <ø> (ø)
contracts/evm/contracts/xcall/CallService.sol	80.71% <50.00%> (ø)
... and 1 more

... and 1 file with indirect coverage changes

[sdpisreddevil]

LGTM