[csolution] CMSIS Solution project fails to be processed when it is located in a directory containing $ (dollar) character

[andbararm]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

When using a project in Keil Studio/MDK6, that is located in a path that contains a dollar sign '$', for example building the project fails:

error csolution: malformed access sequence: '/$test/Blinky_FRDM-K32L3A6
error csolution: processing context 'FRDM-K32L3A6.Debug+FRDM-K32L3A6' failed
Completed: cbuild failed with exit code 1`

Maybe the dollar sign collides with [Access Sequences](https://github.com/Open-CMSIS-Pack/cmsis-toolbox/blob/main/docs/YML-Input-Format.md).

### Expected Behavior

Despite the the dollar sign in the path, the project could still be usable, as the dollar sign is no reserved character in file paths.

### Steps To Reproduce

Simply put a project into a path that contains a dollar sign and try to use it.

### Affected tools

- [ ] cbuild
- [ ] cbuild2cmake
- [ ] cpackget
- [x] csolution
- [ ] packchk
- [ ] svdconv

### Affected operating systems

- [x] all

### Environment

CLI and VS Code CMSIS Solution extension

[jkrech]

High level investigation shows, that this error is related to the output path. If the output is redirected (-O) to a path where the resulting absolute path does not contain $ the command is successful.

Workaround:
a) do not use $ in your directory names
b) use -O to redirect all output to a directory without $