(Studio 1.0) Setup a separate shark1.venv for Shark-1.0

[one-lithe-rune]

This is for the SHARK-1.0 branch only, and any potential branches from that, do not merge into main branch

Motivation

I need a working SHARK 1.0 whilst SHARK 2.0 is being constructed, and I still have the draft of #2015 I'm working on for SHARK 1.0. So I need separate .venvs for main/studio_sd2 and SHARK-1.0 branches.

Having a setup_venv on the SHARK-1.0 branch that creates/maintains a separately named .venv, means I can just run that and not worry I've broken the .venv for the other branches.

Changes

• Updates setup_venv.ps1 to create and use ./shark1.venv/
• Updates setup_venv.sh to default to creating ./shark1.venv/

Possible Problems/Concerns

• I haven't tested the setup_venv.sh change, someone on Linux/Mac will need to check that.
• I'm assuming we want to keep the main branch .venv as ./shark.venv/
• I had something much more clever checking git commits and such and deciding which .venv to setup, but then I realised that was pointless, since anything not descended from SHARK-1.0 can just use the current setup_venv unaltered.
• Still need to remember to activate the right .venv when switching branches (git hook?)

[monorimet]

Looks good to me.