feat: starting page

src/db.rs

@@ -0,0 +1,26 @@
+use std::{fs, io};
+
+pub fn get_last_opened() -> io::Result<String> {
+    Ok(fs::read_to_string(
+        dirs::data_dir()
+            .ok_or(io::Error::new(
+                io::ErrorKind::NotFound,
+                "unable to find data_dir",
+            ))?
+            .join("keepice.txt"),
+    )?)
+}
+
+pub fn set_last_opened(path: impl AsRef<str>) -> io::Result<()> {
+    fs::write(
+        dirs::data_dir()
+            .ok_or(io::Error::new(
+                io::ErrorKind::NotFound,
+                "unable to find data_dir",
+            ))?
+            .join("keepice.txt"),
+        path.as_ref(),
+    )?;
+
+    Ok(())
+}