Add plus and dollar sign to terminal paths (#8321)

After fix (file path is now clickable):
<img width="1019" alt="Screenshot 2024-02-23 at 8 59 45 PM"
src="https://github.com/zed-industries/zed/assets/63214891/cbdcb0f5-cd58-436b-9980-f657436f2bc0">

Before fix:
<img width="936" alt="Screenshot 2024-02-23 at 9 15 25 PM"
src="https://github.com/zed-industries/zed/assets/63214891/72d27155-a708-4b8d-a0b6-85d1e9031627">

Release Notes:

- Fixed an issue with terminal paths not allowing links when the path
included `+` or `$` symbols.
([#8256](https://github.com/zed-industries/zed/issues/#8256)).