chore: Reorganize file tree for easier onboarding. Rust project now at the root for simple git clone && cargo run

opnsense-config/src/error.rs

@@ -0,0 +1,19 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("XML error: {0}")]
+    Xml(String),
+    #[error("SSH error: {0}")]
+    Ssh(#[from] russh::Error),
+    #[error("SSH Client error: {0}")]
+    SftpClient(#[from] russh_sftp::client::error::Error),
+    #[error("Command failed : {0}")]
+    Command(String),
+    #[error("I/O error: {0}")]
+    Io(#[from] std::io::Error),
+    #[error("Config error: {0}")]
+    Config(String),
+    #[error("Unexpected error: {0}")]
+    Unexpected(String),
+}