pico-setup-ubuntu

For Ubuntu 22.04.1 LTS The original pico-setup was intended to run on a R-Pi and worked somewhat on Ubuntu.

In Ubuntu in the ~/Downloads do a wget https://raw.githubusercontent.com/jimfred/pico-setup-ubuntu/master/pico_setup.sh, fix file permissions and run and address issues listed below:

Things that didn't work completely on Ubuntu:

Visual Studio code didn't install - Ubuntu wanted to install snap install code --classic instead of using apt. Three extensions still need to be installed:
```
code --install-extension marus25.cortex-debug
code --install-extension ms-vscode.cmake-tools
code --install-extension ms-vscode.cpptools
```
udev rules are needed for openocd (for debug and for serial) Fixes problems seen as: "error: Can't find a picoprobe device! Please check device connections and permissions." and problems opening /dev/ttyACM0 serial port
The gdb-multiarch, version 12.0.90, had a bug that caused the debugger to throw an assertion whenever the target program paused, resulting in an error in the Debug Console
```
build/gdb-wIRHdd/gdb-12.0.90/gdb/value.c:1731: internal-error: value_copy: Assertion arg->contents != nullptr' failed.
```
Solution here: https://forums.raspberrypi.com/viewtopic.php?t=333992#p2045778. I think it's risky to automate this reliably in all situations.
minicom didn't install