fix: preview files containing special \x1b characters as plain text and escape

[Xerxes-2]

fix #1391

[sxyazi]

I think we should preview these ASCII sequences as code, rather than outputting and rendering them directly to the terminal because:

1. ansi_to_tui only supports a limited set of cases. If these escape codes include cursor movements, it could cause issues.
2. This is a code previewer, so the expected result should be treated as a code preview, not as actual rendering them.

[Xerxes-2]

I think we should preview these ASCII sequences as code, rather than outputting and rendering them directly to the terminal because:

1. ansi_to_tui only supports a limited set of cases. If these escape codes include cursor movements, it could cause issues.
2. This is a code previewer, so the expected result should be treated as a code preview, not as actual rendering them.

Now the previewer should treat esc as space

[sxyazi]

Thanks!