languages: Add highlighting for Go directives (#47621)

ozacod created 2 months ago

Closes #4381
Before:
<img width="394" height="176" alt="before"
src="https://github.com/user-attachments/assets/7b34b448-9fbc-4a69-abaf-8b621d22ef1e"
/>

After:
<img width="394" height="176" alt="after"
src="https://github.com/user-attachments/assets/388f997c-ca02-4fb4-b8db-4d6f7e9cd302"
/>

Release Notes:

- Added highlighting for Go directives

Change summary

crates/languages/src/go/highlights.scm | 8 ++++++++
1 file changed, 8 insertions(+)

Detailed changes

crates/languages/src/go/highlights.scm

@@ -138,3 +138,11 @@
 ] @constant.builtin
 
 (comment) @comment
+
+; Go directives
+((comment) @preproc
+ (#match? @preproc "^//go:"))
+
+((comment) @preproc
+ (#match? @preproc "^// \\+build"))
+