chore: cmd errors: show stderr output instead of just exit code

[tasosbit]

ℹ Overview

Fixed error message display in commands, e.g. node start, node stop

✅ Acceptance:

• Pre-commit checks pass

[codecov]

Codecov Report

Attention: Patch coverage is 24.00000% with 19 lines in your changes missing coverage. Please review.

Project coverage is 45.70%. Comparing base (5a343e2) to head (f6ce140).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/configure/configure.go	0.00%	9 Missing ⚠️
internal/algod/mac/mac.go	0.00%	6 Missing ⚠️
internal/algod/linux/linux.go	60.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #171      +/-   ##
==========================================
+ Coverage   45.43%   45.70%   +0.27%     
==========================================
  Files          89       89              
  Lines        6977     6988      +11     
==========================================
+ Hits         3170     3194      +24     
+ Misses       3550     3541       -9     
+ Partials      257      253       -4     

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