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.

tests/development/test_modulo_simple_main.nyash

@@ -0,0 +1,37 @@
+// 🧪 % Modulo Operator Test - Simple functionality verification
+
+static box Main {
+    init { console }
+    
+    main() {
+        me.console = new ConsoleBox()
+        me.console.log("🧪 Testing % Modulo Operator")
+        
+        // Test 1: Basic modulo operation
+        local result1 = 10 % 3
+        me.console.log("10 % 3 = " + result1)
+        
+        // Test 2: Chip-8 style bit masking 
+        local result2 = 4096 % 4096
+        me.console.log("4096 % 4096 = " + result2)
+        
+        // Test 3: Another typical case
+        local result3 = 256 % 16  
+        me.console.log("256 % 16 = " + result3)
+        
+        // Test 4: Common modulo pattern
+        local result4 = 17 % 5
+        me.console.log("17 % 5 = " + result4)
+        
+        // Check results
+        if result1 == 1 and result2 == 0 and result3 == 0 and result4 == 2 {
+            me.console.log("✅ % Modulo operator test SUCCESSFUL!")
+        } else {
+            me.console.log("❌ % Modulo operator test FAILED!")
+            me.console.log("Expected: 1, 0, 0, 2")
+            me.console.log("Got: " + result1 + ", " + result2 + ", " + result3 + ", " + result4)
+        }
+        
+        return "Modulo test complete"
+    }
+}