Add colorized brackets support for GLSL (#45727)

Closes #45674

before:
<img width="482" height="271" alt="Screenshot 2025-12-26 at 21 05 50"
src="https://github.com/user-attachments/assets/d1bba3e1-04f3-4b8d-a187-8da80cee7e22"
/>
after
<img width="481" height="244" alt="Screenshot 2025-12-26 at 21 06 23"
src="https://github.com/user-attachments/assets/4778c779-7082-4701-821e-b825b05b4097"
/>


Release Notes:

- Fixes colorized brackets for the GLSL extension

---------

Co-authored-by: Finn Evers <finn.evers@outlook.de>

extensions/glsl/languages/glsl/brackets.scm

@@ -0,0 +1,3 @@
+("[" @open "]" @close)
+("{" @open "}" @close)
+("(" @open ")" @close)