added load_from_file to fomod config

src/fomod.rs

@@ -2,6 +2,8 @@
 // https://github.com/luctius/fomod/
 // Original license: MIT / Apache-2.0
 
+use std::{error::Error, fs, path::Path};
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Deserialize, PartialEq)]
@@ -41,6 +43,15 @@ pub struct Config {
     pub conditional_file_installs: Option<ConditionalFileInstallList>,
 }
 
+impl Config {
+    pub fn load_from_file(path: impl AsRef<Path>) -> Result<Self, Box<dyn Error>> {
+        let data = fs::read_to_string(path)?;
+        let config = quick_xml::de::from_str(&data)?;
+
+        Ok(config)
+    }
+}
+
 #[derive(
     Copy, Clone, Debug, Deserialize, Serialize, PartialEq, Eq, PartialOrd, Ord, Hash, Default,
 )]