Replaced impl_cast with a new and improved trait

With this trait the impl_cast macros are no longer needed, simplifying
everything.
This commit also improved how the actual casting itself is handled.

Cargo.lock

@@ -76,6 +76,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "async-trait",
+ "automation_cast",
  "axum",
  "bytes",
  "console-subscriber",
@@ -84,7 +85,6 @@ dependencies = [
  "eui48",
  "futures",
  "google-home",
- "impl_cast",
  "indexmap 2.0.0",
  "paste",
  "pollster",
@@ -104,6 +104,10 @@ dependencies = [
  "wakey",
 ]
 
+[[package]]
+name = "automation_cast"
+version = "0.1.0"
+
 [[package]]
 name = "axum"
 version = "0.6.20"
@@ -568,8 +572,8 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "async-trait",
+ "automation_cast",
  "futures",
- "impl_cast",
  "serde",
  "serde_json",
  "thiserror",
@@ -761,14 +765,6 @@ dependencies = [
  "unicode-normalization",
 ]
 
-[[package]]
-name = "impl_cast"
-version = "0.1.0"
-dependencies = [
- "quote",
- "syn 2.0.28",
-]
-
 [[package]]
 name = "indexmap"
 version = "1.9.3"