Add serial interface for initial configuratio (#664)

* add SerialReader

* fix SerialReader

* add config upload script

* add serial command to print ip address

* update serial script to save configuration and reset after upload

* fix updater

* fix updater

* serial config fixes

* serial config fixes

* fix wifi static example configuration

* add readme for sendcfg.py

.gitignore

@@ -1,5 +1,6 @@
 .dummy
 .idea
+scripts/.idea
 build
 debug
 release
@@ -28,4 +29,4 @@ sdkconfig
 # NodeJS en pnpm
 .pnpm
 node_modules
-pnpm-lock.yaml
+pnpm-lock.yaml