feat: bootstrap skeleton + lexer (Phase 0)

Makefile

@@ -0,0 +1,26 @@
+NIM := nim
+SRC := src/main.nim
+OUT := buxc
+BUILD_DIR := build
+
+.PHONY: all build test clean
+
+all: build
+
+build:
+	$(NIM) c -o:$(OUT) -d:release $(SRC)
+
+dev:
+	$(NIM) c -o:$(OUT) $(SRC)
+
+test: build
+	@echo "Running lexer tests..."
+	$(NIM) c -r tests/lexer_test.nim
+	@echo "Running integration tests..."
+	./$(OUT) new _test_tmp_pkg
+	./$(OUT) --version
+
+clean:
+	rm -f $(OUT)
+	rm -rf $(BUILD_DIR)
+	rm -rf nimcache