Initial backup of LTP-305G matrix clock setup on matrixpi

Captures everything needed to redeploy the two-display clock (hour on I2C
0x61, minute on I2C 0x63) on a fresh Pi:

- Both systemd units (matrix0x61.service, matrix0x63.service)
- Deployed Pimoroni script tree, including the local %I (12-hour) clock
  customization
- Vendored upstream sources (ltp305-python, breakout-garden) so restore is
  fully offline-capable
- Boot config snippet enabling I2C
- install.sh that wires it all back up idempotently
- Inventory doc cross-referencing every live-system path

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

vendor/breakout-garden/examples/uv-warning/README.md

@@ -0,0 +1,49 @@
+# UV warning example
+
+This example uses a VEML6075 UVA/B sensor, a 5x5 RGB matrix, and a 1.2" OLED breakout
+to display average UV index as a traffic light warning on the RGB matrix, with green
+being a low UV index, yellow/orange being moderate, and red high or extreme. The numerical
+values and a descriptive warning are displayed on the OLED.
+
+## Pre-requisites
+
+This example requires:
+
+- A Pimoroni [Breakout Garden](https://shop.pimoroni.com/products/breakout-garden-hat-i2c-spi)
+- A Pimoroni [VEML6075 UVA/B Sensor Breakout Breakout](https://shop.pimoroni.com/products/veml6075-uva-b-sensor-breakout)
+- A Pimoroni [5x5 RGB Matrix Breakout](https://shop.pimoroni.com/products/5x5-rgb-matrix-breakout)
+- A Pimoroni [1.12" OLED Breakout (SPI)](https://shop.pimoroni.com/products/1-12-oled-breakout)
+
+## Installation
+
+Pop the breakouts into your Breakout Garden, and then run the `install.sh`
+script in the root of this repository with `sudo ./install.sh` to automagically
+install the libraries to run the I2C breakouts.
+
+For this example you'll need to make sure some additional software is installed:
+
+```
+sudo apt install python3-pil
+```
+
+You'll need to clone and install the library for the 1.12" OLED Breakout (SPI)
+as follows:
+
+```
+git clone https://github.com/pimoroni/sh1106-python
+sudo ./install.sh
+```
+
+This example assumes that you have the OLED plugged into the front slot on the
+Breakout Garden HAT, which should also work with the Breakout Garden Mini HAT.
+To change it to the back slot, change `device=1` to `device=0` on the line
+where the OLED is set up.
+
+## Running this example
+
+To run this example, type `./uv-warning.py` in the terminal
+
+## Notes
+
+You might want rotate your Pi and Breakout Garden so that the UV sensor is facing 
+upwards at a better angle to detect UV light.