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/programs/CMakeLists.txt

@@ -0,0 +1,8 @@
+add_subdirectory(aes)
+add_subdirectory(hash)
+add_subdirectory(pkey)
+add_subdirectory(random)
+add_subdirectory(ssl)
+add_subdirectory(test)
+add_subdirectory(x509)
+add_subdirectory(util)