Add colorized brackets support for GLSL (#45727)

Thinkseal and Finn Evers created

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

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

Change summary

extensions/glsl/languages/glsl/brackets.scm | 3 +++
1 file changed, 3 insertions(+)

Detailed changes