Initial commit: MT firmware project

- BLE peripheral applications
- dr_piezo and bladder_patch projects

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

modules/nrfx/mdk/nrf51801_xxab.ld

@@ -0,0 +1,13 @@
+/* Linker script to configure memory regions. */
+
+SEARCH_DIR(.)
+GROUP(-lgcc -lc -lnosys)
+
+MEMORY
+{
+  FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x30000
+  RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0x4000
+}
+
+
+INCLUDE "nrf_common.ld"