Add Julia as a shell type in core

[anthonykim1]

Part of: #155530
This should allow clear separation when users attempt to "Terminal: Run Recent Command", as in Julia users will only see Julia commands from VS Code and not those from other shells.

[anthonykim1]

Verification Steps:

1. Install and Julia and

2. Head over to command palette (launch via ctrl/cmd + shift + p) and press on Julia: Start REPL or Julia: Restart REPL 3. Type in some Julia command in Terminal 4. Open command palette again and click on "Terminal: Run Recent Command" 5. Observe you only see command from Julia shell and no commands from other shell.

[amunger]

the Terminal: Run recent command command just no-ops for me if I have a Julia REPL running, even after running commands in there. I don't see any errors in the dev tools.

[anthonykim1]

@amunger What is exact name of the julia executable in your windows machine? Is it something that deviates from "julia.exe"?

[amunger]

from julia logs, it looks like it is using "julia.exe"

Trying to locate Julia binary...
Juliaup not found, locating Julia by other means.
The identified Julia executable is "julia.exe" with args "".