Missing shell script support

### Apache NetBeans version

Apache NetBeans 21

### What happened

You used to be able to get support for sh/bash files after installing C++ support, that no longer seems to be the case.
It should've always been part of the base ide, not C++ bundle. Now it seems to be completely gone from the IDE? I tried enabling C++ support but that didn't change anything.

### Language / Project Type / NetBeans Component

_No response_

### How to reproduce

Open any bash script

### Did this work correctly in an earlier version?

Apache NetBeans 16 or earlier

### Operating System

Windows 11

### JDK

21.0.1

### Apache NetBeans packaging

Apache NetBeans provided installer

### Anything else

_No response_

### Are you willing to submit a pull request?

No

Start by reproducing the issue in Apache NetBeans 21 on Windows 11 by opening a bash script, then compare the behavior with NetBeans 16 or earlier. Trace how shell-script support was previously provided by the base IDE or C++ support; done means bash files regain the expected support without requiring the C++ bundle.

Written by the indexing model from the issue text.