Feat: bank / pattern import / export feature + documentation

src/state/modal.rs

@@ -11,6 +11,7 @@ pub enum ConfirmAction {
     ResetBank { bank: usize },
     ResetPatterns { bank: usize, patterns: Vec<usize> },
     ResetBanks { banks: Vec<usize> },
+    ImportBank { bank: usize },
 }
 
 impl ConfirmAction {
@@ -26,6 +27,7 @@ impl ConfirmAction {
             Self::ResetBank { bank } => format!("Reset bank {}?", bank + 1),
             Self::ResetPatterns { patterns, .. } => format!("Reset {} patterns?", patterns.len()),
             Self::ResetBanks { banks } => format!("Reset {} banks?", banks.len()),
+            Self::ImportBank { bank } => format!("Import bank from clipboard? (replaces bank {:02})", bank + 1),
         }
     }
 }