feat: copying entry fields

src/db.rs

@@ -1,5 +1,32 @@
 use std::{fs, io};
 
+#[derive(Clone, Copy, Default, PartialEq, Eq)]
+pub enum BasicField {
+    Title,
+    #[default]
+    Username,
+    Password,
+    Url,
+}
+impl BasicField {
+    pub fn next(&mut self) {
+        *self = match self {
+            Self::Title => Self::Username,
+            Self::Username => Self::Password,
+            Self::Password => Self::Url,
+            Self::Url => Self::Title,
+        }
+    }
+    pub fn previous(&mut self) {
+        *self = match self {
+            Self::Title => Self::Url,
+            Self::Username => Self::Title,
+            Self::Password => Self::Username,
+            Self::Url => Self::Password,
+        }
+    }
+}
+
 pub fn get_last_opened() -> io::Result<String> {
     Ok(fs::read_to_string(
         dirs::data_dir()