fix(languages): treat tsconfig.json as jsonc #12031
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background:
tsconfig.json allow /* comments */ as well as trailing commas.
issue:
default tsconfig.json generated with tsc --init contains comments, so helix can't handle it correctly.
solution:
treat it as jsonc.
typescript repo has jsonc-parser in devDependencies, so it probably uses jsonc parser internally too. (though I couldn't find relevant code)
other text editors: