feat(core/relays): implement reconnection logic

[hasundue]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 86.52%. Comparing base (5b27059) to head (7f71538).

Files	Patch %	Lines
lib/testing.ts	80.00%	2 Missing ⚠️
core/relays.ts	93.75%	1 Missing ⚠️
core/websockets.ts	75.00%	1 Missing ⚠️
nips/01/relays.ts	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
+ Coverage   85.21%   86.52%   +1.31%     
==========================================
  Files          19       19              
  Lines         683      705      +22     
  Branches       46       49       +3     
==========================================
+ Hits          582      610      +28     
+ Misses        100       93       -7     
- Partials        1        2       +1     

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