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/haptic-trackball/README.md

@@ -0,0 +1,22 @@
+# Haptic trackball example
+
+This example demonstrates how to generate haptic feedback
+as the trackball is scrolled/pressed.
+
+## Pre-requisites
+
+This example requires:
+
+- A Pimoroni [Breakout Garden](https://shop.pimoroni.com/products/breakout-garden-hat-i2c-spi)
+- A Pimoroni [DRV2605L Haptic Breakout](https://shop.pimoroni.com/products/drv2605l-linear-actuator-haptic-breakout)
+- A Pimoroni [Trackball Breakout](https://shop.pimoroni.com/products/trackball-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.
+
+## Running this example
+
+To run this example, type `./haptic-trackball.py` in the terminal.