Added minimal example project for STM32

So far, there are no sources for hardware interrupt handlers and calls to the microcontroller's hardware core (initially planned for the STM32F4xx), but there is a minimal example project for the STM32F4xx without CubeMX (folders with code, Makefile, and libraries)

Author: drowsymike

.github/workflows/telegram_notify.yml

@@ -20,7 +20,7 @@ jobs:
             -d chat_id="${{ secrets.TELEGRAM_CHAT_ID }}" \
             -d parse_mode="HTML" \
             -d disable_web_page_preview="true" \
-            -d text="User <a href='https://github.com/${{ github.actor }}'>${{ github.actor }}</a> committed into 📁 <b>${{ github.repository }}</b>
+            -d text="User <a href='https://github.com/${{ github.actor }}'>${{ github.actor }}</a> committed into <b>${{ github.repository }}</b>
 
           <b>Commit header:</b> $HEADER
           <b>Commit description:</b> <i>$DESC</i>

.vscode/c_cpp_properties.json

@@ -3,11 +3,11 @@
         {
             "name": "STM32F4",
             "includePath": [
-                "${workspaceFolder}/config",
-                "${workspaceFolder}/app/inc",
-                "${workspaceFolder}/platform/hal/Inc",
-                "${workspaceFolder}/platform/cmsis/CMSIS/Include",
-                "${workspaceFolder}/platform/cmsis/CMSIS/Device/ST/STM32F4xx/Include",
+                "${workspaceFolder}/examples/stm32_f4x/config",
+                "${workspaceFolder}/examples/stm32_f4x/app/inc",
+                "${workspaceFolder}/examples/stm32_f4x/platform/hal/Inc",
+                "${workspaceFolder}/examples/stm32_f4x/platform/cmsis/CMSIS/Include",
+                "${workspaceFolder}/examples/stm32_f4x/platform/cmsis/CMSIS/Device/ST/STM32F4xx/Include",
                 "${workspaceFolder}/**"
             ],
             "defines": [