refactor: use IntEnum instead of a custom implementation for ConfigKey in config.rs

Cargo.lock

@@ -210,6 +210,7 @@ dependencies = [
  "esp-radio",
  "esp-rtos",
  "esp-storage",
+ "int-enum",
  "picoserve",
  "portable-atomic",
  "postcard",
@@ -1431,6 +1432,18 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "int-enum"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e366a1634cccc76b4cfd3e7580de9b605e4d93f1edac48d786c1f867c0def495"
+dependencies = [
+ "proc-macro2",
+ "proc-macro2-diagnostics",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.18"
@@ -1720,6 +1733,18 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "proc-macro2-diagnostics"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af066a9c399a26e020ada66a034357a868728e72cd426f3adcd35f80d88d88c8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+ "version_check",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.45"