Fix exit with status code on error. Also print annotations on error

[jlndk]

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[github-actions]

Code Coverage 🔎

% Statements	% Branch	% Funcs	% Lines
68.91 🟠	68.75 🟠	54.55 🟠	69.02 🟠

Full overview

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File	% Statements	% Branch	% Funcs	% Lines
src
run.ts	92.86 🟢	94.44 🟢	85.71 🟡	92.5 🟢
testResults.ts	100 🟢	100 🟢	100 🟢	100 🟢
comment.ts	100 🟢	71.43 🟠	100 🟢	100 🟢
args.ts	41.67 🔴	0 🔴	0 🔴	41.67 🔴
html.ts	100 🟢	100 🟢	100 🟢	100 🟢
util.ts	100 🟢	100 🟢	100 🟢	100 🟢
output.ts	100 🟢	100 🟢	100 🟢	100 🟢
main.ts	0 🔴	0 🔴	0 🔴	0 🔴
src/coverage
index.ts	44.44 🔴	100 🟢	0 🔴	44.44 🔴
file.ts	40 🔴	50 🔴	0 🔴	40 🔴
format.ts	72.73 🟠	100 🟢	37.5 🔴	75 🟠