fix(interactive): skip comment lines when reading requests from a file

[Mohammed Alkindi (MohammedAlkindi)]

processRequests in the TypeScript port dispatches every non-empty line of an input file to the translator. The Python port skips comments first.

python/src/typechat/_internal/interactive.py:

lines = filter(str.rstrip, file)
for line in lines:
    if line.startswith("# "):
        continue

typescript/src/interactive/interactive.ts had only the line.length check, so the header comments in the shipped example are sent as requests. typescript/examples/healthData/src/input.txt opens with # and # Conversations with a Health Data Agent, byte-identical in shape to python/examples/healthData/input.txt, which the Python demo skips.

This aligns the TypeScript branch with the Python one exactly, # prefix and all. Worth noting the parity is literal rather than improved: both ports still pass a bare # line through, since neither tests for it, and I left that alone rather than widening the change.

npm install --ignore-scripts then npx tsc -p src --noEmit both exit 0.

Could not verify: there is no test file for interactive.ts on the TypeScript side, unlike python/tests/test_interactive.py, so there is no existing suite to fail before and pass after.