Pimoroni led shim notifications

**Is your feature request related to a problem?
Please describe.**
Yes, unable to install/use pimoroni led shim.

A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
I would like to make use of a pimoroni led shim I
have laying around to display led notifications. For example when a handshake is captures, or when pwnagotchi is scanning.

**Describe the solution you'd like**
A clear and concise description of what you want to happen.
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To enable install and use of pimoroni led shim for more customisation of the pwnagotchi. Below is the git link to the library and everything that is needed, including examples:
https://github.com/pimoroni/led-shim
Also the hardware is v easy to use, it plugs directly on the GPIOs and doesn't interfere with the eink paper display as far as I am aware

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.
There is already a pin for gpio buttons so I think this should be to time consuming to implement.

**Additional context**
Add any other context or screenshots about the feature request here.

Start by reviewing the linked Pimoroni led-shim library and its examples, then inspect how pwnagotchi currently handles GPIO buttons and notification events. Define the integration points for handshake and scanning indications, and verify that the hardware can be enabled without interfering with the e-ink display.

Written by the indexing model from the issue text.