cleaned project, added a first working version of the bootloader

.gitignore

@@ -0,0 +1,69 @@
+# Build directories
+build/
+build-*/
+_build*/
+cmake-build-*/
+
+# Sysbuild / child images
+_child_image/
+modules/
+mcuboot/
+zephyr/
+
+# Object and binary files
+*.o
+*.a
+*.so
+*.d
+*.elf
+*.bin
+*.hex
+*.map
+*.lst
+*.out
+
+# Firmware update artifacts
+*.zip
+*.log
+*.signed
+*.update
+
+# CMake generated files
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+CTestTestfile.cmake
+Makefile
+*.cmake
+
+# Zephyr generated files
+zephyr/
+modules/
+*.config
+*.conf.old
+include/generated/
+.zephyr
+
+# IDE/editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*.user
+*.workspace
+*.project
+*.cproject
+
+# Python cache
+__pycache__/
+*.pyc
+
+# Backup / temp files
+*~
+*.bak
+*.orig
+
+# OS-specific
+.DS_Store
+Thumbs.db
+