Switch project from Arduino to PlatformIO (#52)

* Moved to platformio

* Moved cad models and schematics under extras

* Update README.md

* Added .gitignore

* Specify upload protocol

* Refactor platformio.ini

* Allow building igate mode from platformio file

* Move images to extras

* Update readme

* Update readme

* Use specific arduinoespressif version

* Added ttgo-lora32-v1

* Rename file and update gitignore

* Fix warnings

* Update readme

* Update readme

* Do not send telemetry in igate mode and send battery level every minute

Author: sh123

.gitignore

@@ -1,33 +1,2 @@
-# Prerequisites
-*.d
-
-# Compiled Object files
-*.slo
-*.lo
-*.o
-*.obj
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Compiled Dynamic libraries
-*.so
-*.dylib
-*.dll
-
-# Fortran module files
-*.mod
-*.smod
-
-# Compiled Static libraries
-*.lai
-*.la
-*.a
-*.lib
-
-# Executables
-*.exe
-*.out
-*.app
-*.log
+.pio
+.vscode