Added release mode building

Now the build script enables you to:
- Build in debug mode (default no arguments)
- Build in debug mode then run (`run` argument)
- Build in release mode (`release` argument)

build.sh

@@ -5,12 +5,21 @@ set -xe
 OUT="cw_tree.out"
 GFLAGS="-Wall -Wextra -Wswitch-enum -std=c++17"
 DFLAGS="-ggdb -fsanitize=address -fsanitize=undefined"
+RFLAGS="-O2"
 CFLAGS="$GFLAGS $DFLAGS"
 LIBS="-lraylib -lm"
 
-c++ $CFLAGS -o $OUT src/node.cpp src/state.cpp src/worker.cpp src/main.cpp $LIBS
+build() {
+    c++ $CFLAGS -o $OUT src/node.cpp src/state.cpp src/worker.cpp src/main.cpp $LIBS
+}
 
 if [ "$1" = "run" ]
 then
-    ./$OUT
+    build && ./$OUT
+elif [ "$1" = "release" ]
+then
+    CFLAGS="$GFLAGS $RFLAGS"
+    build;
+else
+    build;
 fi