added assembler skeleton code

assembler/src/lib.rs

@@ -1,14 +1,14 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
+use common::prelude::Instruction;
+
+pub fn assemble(src: &str) -> Vec<Instruction> {
+    todo!()
 }
 
-#[cfg(test)]
-mod tests {
-    use super::*;
+pub fn disassemble(binary: Vec<Instruction>) -> String {
+    // TODO: disassembling functionality
 
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
+    // - we probably don't need to implement this for a while yet.
+    // - this method should recover symbols such as labels and variables from the human written assembly, recognising
+    //   sequences that are expansions of pseduo-instructions and reversing this to produce near enough the original source code.
+    todo!()
 }