Feat: bank / pattern import / export feature + documentation

src/commands.rs

@@ -67,6 +67,20 @@ pub enum AppCommand {
         bank: usize,
         pattern: usize,
     },
+    SharePattern {
+        bank: usize,
+        pattern: usize,
+    },
+    ImportPattern {
+        bank: usize,
+        pattern: usize,
+    },
+    ShareBank {
+        bank: usize,
+    },
+    ImportBank {
+        bank: usize,
+    },
     CopyPatterns {
         bank: usize,
         patterns: Vec<usize>,