Add ',' to word chars for line wrapping (#17590)

Closes #16407 

Adds ',' to the is_word_char() matches for line wrapping, so that commas
aren't wrapped to the start of a new line.

Release Notes:

- N/A

crates/gpui/src/text_system/line_wrapper.rs

@@ -153,7 +153,7 @@ impl LineWrapper {
         matches!(c, '\u{0400}'..='\u{04FF}') ||
         // Some other known special characters that should be treated as word characters,
         // e.g. `a-b`, `var_name`, `I'm`, '@mention`, `#hashtag`, `100%`, `3.1415`, `2^3`, `a~b`, etc.
-        matches!(c, '-' | '_' | '.' | '\'' | '$' | '%' | '@' | '#' | '^' | '~') ||
+        matches!(c, '-' | '_' | '.' | '\'' | '$' | '%' | '@' | '#' | '^' | '~' | ',') ||
         // Characters that used in URL, e.g. `https://github.com/zed-industries/zed?a=1&b=2` for better wrapping a long URL.
         matches!(c,  '/' | ':' | '?' | '&' | '=') ||
         // `⋯` character is special used in Zed, to keep this at the end of the line.