Initial commit: MT firmware project

- BLE peripheral applications
- dr_piezo and bladder_patch projects

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

external/mbedtls/scripts/find-mem-leak.cocci

@@ -0,0 +1,20 @@
+@@
+expression x, y;
+statement S;
+@@
+  x = mbedtls_calloc(...);
+  y = mbedtls_calloc(...);
+  ...
+* if (x == NULL || y == NULL)
+    S
+
+@@
+expression x, y;
+statement S;
+@@
+  if (
+*   (x = mbedtls_calloc(...)) == NULL
+    ||
+*   (y = mbedtls_calloc(...)) == NULL
+  )
+    S