feat: Ethereum RPC call "eth_blockByNumber"

[enitrat]

Implements the eth_blockByNumber RPC endpoint support

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Testing
• Other (please describe):

What is the current behavior?

Issue Number: #84

What is the new behavior?

API endpoint /ethereum/get_block_by_number/<block>/<full_tx>, CLI command query-block-by-number, beerus core command implementation and tests for eth_getBlockByNumber

Does this introduce a breaking change?

• Yes
• No

Other information

[codecov-commenter]

Codecov Report

Base: 87.66% // Head: 87.19% // Decreases project coverage by -0.46% ⚠️

Coverage data is based on head (0745cac) compared to base (f677e75).
Patch coverage: 75.38% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #128      +/-   ##
==========================================
- Coverage   87.66%   87.19%   -0.47%     
==========================================
  Files          23       23              
  Lines        1637     1702      +65     
==========================================
+ Hits         1435     1484      +49     
- Misses        202      218      +16     

Impacted Files	Coverage Δ
...ore/src/lightclient/ethereum/helios_lightclient.rs	20.33% <0.00%> (-3.67%)	⬇️
beerus_core/src/lightclient/ethereum/mod.rs	100.00% <ø> (ø)
beerus_cli/src/model.rs	62.92% <50.00%> (-1.28%)	⬇️
beerus_rest_api/src/api/ethereum/endpoints.rs	93.92% <90.32%> (-0.75%)	⬇️
beerus_cli/src/ethereum/mod.rs	100.00% <100.00%> (ø)
beerus_cli/src/runner.rs	84.05% <100.00%> (+0.98%)	⬆️
beerus_rest_api/src/api/ethereum/resp/mod.rs	100.00% <100.00%> (ø)
beerus_rest_api/src/lib.rs	91.66% <100.00%> (+0.23%)	⬆️

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[danilowhk]

Lgtm :)