Add way to fail silently when no specific syntax has been found

[scop]

Having ability to fail silently with no output and a non-zero exit status would be useful when configuring bat as an input preprocessor for less. This would accomplish falling back to other preprocessors in case bat doesn't have a specific output available for the given file, such as ones displaying metadata for images, archives, etc.

I implemented this to chroma some time ago, not sure how easily something like this would fit to bat but based on a quick look, it might not be entirely trivial:

• RFE: streaming input processing alecthomas/chroma#501
• cmd: --fail earlier without reading entire input files alecthomas/chroma#502
• alecthomas/chroma@e87e5b2#diff-b335630551682c19a781afebcf4d07bf978fb1f8ac04c6bf87428ed5106870f5

[sharkdp]

Thank you for your feature request. I like this idea.

How would you design the CLI for this? Add a new --fail-if-syntax-unsupported flag (or similar name)?

Slightly related? #1597