Desktop set cef data and cache directory (#2927)

desktop/src/dirs.rs

@@ -0,0 +1,16 @@
+use std::fs::create_dir_all;
+use std::path::PathBuf;
+
+static APP_NAME: &str = "graphite-desktop";
+
+pub(crate) fn ensure_dir_exists(path: &PathBuf) {
+	if !path.exists() {
+		create_dir_all(path).unwrap_or_else(|_| panic!("Failed to create directory at {path:?}"));
+	}
+}
+
+pub(crate) fn graphite_data_dir() -> PathBuf {
+	let path = dirs::data_dir().expect("Failed to get data directory").join(APP_NAME);
+	ensure_dir_exists(&path);
+	path
+}