IZE-551 test ize init

[psihachina]

Change:

• added check TTY
• added ize init unit tests

[codecov-commenter]

Codecov Report

Merging #487 (3b6df54) into main (9153744) will increase coverage by 0.97%.
The diff coverage is 21.05%.

@@            Coverage Diff             @@
##             main     #487      +/-   ##
==========================================
+ Coverage   29.87%   30.85%   +0.97%     
==========================================
  Files          60       60              
  Lines        7584     7545      -39     
==========================================
+ Hits         2266     2328      +62     
+ Misses       5108     4995     -113     
- Partials      210      222      +12     

Impacted Files	Coverage Δ
internal/commands/initialize.go	64.73% <21.05%> (+26.63%)	⬆️
internal/schema/schema.go	61.29% <0.00%> (+30.04%)	⬆️

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