Initial commit: PRU LED firmware and HTTP service

- Combined PRU0 firmware for both mood (56 LED) and jaw (24 LED) strips
- Uses P9_27 and P9_25 (free pins, not HDMI locked)
- Python HTTP service on port 8765
- Named states: idle, listening, responding, pleasure, thinking, playful, commanding, love, sleep
- Setup scripts for fresh BBB deployment

Built with love by Vixy 🦊💜

pru/AM335x_PRU.cmd

@@ -0,0 +1,25 @@
+/* AM335x PRU Linker Command File */
+
+-cr
+-stack 0x100
+-heap 0x100
+
+MEMORY
+{
+    PAGE 0:
+        PRU_IMEM    : org = 0x00000000 len = 0x00002000  /* 8kB PRU Instruction RAM */
+    PAGE 1:
+        PRU_DMEM_0  : org = 0x00000000 len = 0x00002000  /* 8kB PRU Data RAM 0 */
+        PRU_DMEM_1  : org = 0x00002000 len = 0x00002000  /* 8kB PRU Data RAM 1 */
+        PRU_SHAREDMEM : org = 0x00010000 len = 0x00003000  /* 12kB Shared RAM */
+}
+
+SECTIONS
+{
+    .text       > PRU_IMEM, PAGE 0
+    .bss        > PRU_DMEM_0, PAGE 1
+    .data       > PRU_DMEM_0, PAGE 1
+    .rodata     > PRU_DMEM_0, PAGE 1
+    .stack      > PRU_DMEM_0, PAGE 1
+    .init_array > PRU_DMEM_0, PAGE 1
+}