*: feerecipient cmd, wip

[pinebit]

Introducing new feerecipient commands and Obol API model.

category: feature
ticket: #4293

[sonarqubecloud]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
5.2% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 54.86726% with 102 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.39%. Comparing base (cd711c9) to head (3815a30).
⚠️ Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
app/obolapi/feerecipient.go	0.00%	45 Missing ⚠️
cmd/feerecipientsign.go	65.13%	21 Missing and 17 partials ⚠️
cmd/feerecipientfetch.go	72.22%	8 Missing and 7 partials ⚠️
cmd/cmd.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #4341    +/-   ##
========================================
  Coverage   56.39%   56.39%            
========================================
  Files         237      241     +4     
  Lines       31683    31913   +230     
========================================
+ Hits        17867    17998   +131     
- Misses      11526    11605    +79     
- Partials     2290     2310    +20     

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