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/distance/distance.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+
+import os
+import time
+
+from PIL import Image
+from PIL import ImageFont
+from PIL import ImageDraw
+
+import VL53L1X
+
+from luma.core.interface.serial import spi
+from luma.core.render import canvas
+from luma.oled.device import sh1106
+
+print("""This Pimoroni Breakout Garden example requires an
+VL53L1X Time of Flight Sensor Breakout and a 1.12" OLED Breakout (SPI).
+
+The Park-O-Matic 6000 is a car reversing indicator mockup!
+
+Press Ctrl+C a couple times to exit.
+""")
+
+# Set up OLED
+
+oled = sh1106(spi(port=0, device=1, gpio_DC=9), rotate=2, height=128, width=128)
+
+# Set up VL53L1X Time of Flight sensor
+
+tof = VL53L1X.VL53L1X(i2c_bus=1, i2c_address=0x29)
+tof.open() # Initialise the I2C bus and configure the sensor
+tof.start_ranging(3) # Start ranging, 1 = Short Range, 2 = Medium Range, 3 = Long Range
+
+
+# Load fonts
+
+rr_path = os.path.abspath(os.path.join(os.path.dirname(__file__), 'fonts', 'Roboto-Regular.ttf'))
+rb_path = os.path.abspath(os.path.join(os.path.dirname(__file__), 'fonts', 'Roboto-Black.ttf'))
+rr_24 = ImageFont.truetype(rr_path, 24)
+rb_20 = ImageFont.truetype(rb_path, 20)
+rr_12 = ImageFont.truetype(rr_path, 12)
+
+
+i = 0
+threshold = 20 # Threshold at which the warning indicator flashes, in cm
+
+# Main loop
+
+while True:
+    i += 1
+
+    background = Image.open("images/distance.png").convert(oled.mode) # Load the artwork
+
+    draw = ImageDraw.ImageDraw(background)
+
+    # Measure the distance and write to the right place on the display
+
+    cm = tof.get_distance() // 10
+    cm += 1
+    pos = 80 - (rb_20.getsize(str(cm))[0] / 2)
+    draw.text((pos, 30), "{}".format(cm), fill="white", font=rb_20)
+
+    # Flash the warning indicator if the distance is below the threshold
+
+    if cm > threshold or i % cm == 1:
+        draw.rectangle([(76, 66), (115, 110)], fill="black")
+
+    # Display on the OLED
+
+    oled.display(background)
+
+    time.sleep(0.05)