Add comprehensive test system for Go-to-Zig compiler

- Implement end-to-end test runner for compilation and behavior tests
- Add test cases for basic print functionality
- Refactor translator to use proper AST generation
- Remove redundant programs directory in favor of tests

tests/basic/print_escape.expected

@@ -0,0 +1,5 @@
+Hello	World!
+Line 1
+Line 2
+Quote: "test"
+Backslash: \