The `show-face` command shows what font face Ghostty will use to render a
specific codepoint. Note that this command does not take into consideration
grapheme clustering or any other Unicode features that might modify the
presentation of a codepoint, so this may show a different font face than
Ghostty uses to render a codepoint in a terminal session.

Flags:

  * `--cp`: Find the face for a single codepoint. The codepoint may be specified
    in decimal (`--cp=65`), hexadecimal (`--cp=0x41`), octal (`--cp=0o101`), or
    binary (`--cp=0b1000001`).

  * `--string`: Find the face for all of the codepoints in a string. The
    string must be a valid UTF-8 sequence.

  * `--style`: Search for a specific style. Valid options are `regular`, `bold`,
    `italic`, and `bold_italic`.

  * `--presentation`: If set, force searching for a specific presentation
    style. Valid options are `text` and `emoji`. If unset, the presentation
    style of a codepoint will be inferred from the Unicode standard.