feat: testing code, switch to rppal gpio lib, get mqtt working in both directions

Cargo.lock

@@ -189,12 +189,6 @@ dependencies = [
  "r-efi",
 ]
 
-[[package]]
-name = "gpio"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fe6783270536547ac473c9d2ae5a7e0e715ea43f29004ced47fbd1c1372d2c7"
-
 [[package]]
 name = "hashbrown"
 version = "0.17.1"
@@ -259,7 +253,7 @@ dependencies = [
 name = "mqtt-remote-gpio"
 version = "0.1.0"
 dependencies = [
- "gpio",
+ "rppal",
  "rumqttc",
  "yaml-rust2",
 ]
@@ -326,6 +320,15 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rppal"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1ce3b019009cff02cb6b0e96e7cc2e5c5b90187dc1a490f8ef1521d0596b026"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "rumqttc"
 version = "0.25.1"