feat: Prepare for code modularization and cleanup

- Archive old documentation and test files to `docs/archive/` and `local_tests/`.
- Remove various temporary and old files from the project root.
- Add `nekocode-rust` analysis tool and its output files (`nekocode/`, `.nekocode_sessions/`, `analysis.json`).
- Minor updates to `apps/chip8_nyash/chip8_emulator.nyash` and `local_tests` files.

This commit cleans up the repository and sets the stage for further code modularization efforts, particularly in the `src/interpreter` and `src/parser` modules, based on recent analysis.

local_tests/test_simple_loop.nyash

@@ -0,0 +1,18 @@
+// Test simple loop for WASM compilation
+static box Main {
+    init { counter, result }
+    
+    main() {
+        me.counter = 0
+        me.result = 0
+        
+        // Simple loop that should generate Jump/Branch instructions
+        loop(me.counter < 5) {
+            me.result = me.result + me.counter
+            me.counter = me.counter + 1
+        }
+        
+        print(me.result)
+        return me.result
+    }
+}