Highlight shebang in TypeScript and JavaScript (#30531)

d1y created

After:

![image](https://github.com/user-attachments/assets/8ae1049d-96c7-45e2-b905-1f0fba7f862c)

Before:

![image](https://github.com/user-attachments/assets/56317b12-d745-45f4-a7b6-880507884bae)


Release Notes:

- Typescript and javascript highlight shebang-line

Change summary

crates/languages/src/javascript/highlights.scm | 2 ++
crates/languages/src/typescript/highlights.scm | 2 ++
2 files changed, 4 insertions(+)

Detailed changes