feat: refactor devimint into a library

[maan2003]

this can be external integrators to run tests with custom modules

[codecov]

Codecov Report

Attention: 1810 lines in your changes are missing coverage. Please review.

Comparison is base (9016ec3) 58.07% compared to head (c9b035e) 58.05%.
Report is 17 commits behind head on master.

Files	Patch %	Lines
devimint/src/tests.rs	0.00%	1450 Missing ⚠️
devimint/src/cli.rs	0.00%	224 Missing ⚠️
devimint/src/gatewayd.rs	0.00%	69 Missing ⚠️
devimint/src/devfed.rs	0.00%	54 Missing ⚠️
devimint/src/main.rs	0.00%	6 Missing ⚠️
devimint/src/federation.rs	0.00%	4 Missing ⚠️
devimint/src/lib.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4176      +/-   ##
==========================================
- Coverage   58.07%   58.05%   -0.03%     
==========================================
  Files         192      196       +4     
  Lines       43115    43141      +26     
==========================================
+ Hits        25038    25044       +6     
- Misses      18077    18097      +20     

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[maan2003]

for reviewing:
git diff @~:devimint/src/main.rs @:devimint/src/tests.rs

[dpc]

❤️