feat!: output build logs with `--json` flag as well

[robingenz]

Parsing on Linux:

cat logs.txt | tac | sed -n '1,/^{/p' | tac | jq -r '.id' 

Parsing on MacOS:

cat logs.txt | tail -r | sed -n '1,/^{/p' | tail -r | jq -r '.id' 

Simplified version:

cat logs.txt | sed -n '/^{/,$p' | jq -r '.id'\              

[robingenz]

Closed by 2eec2d9