Adds basic parser with include file support and variable substitution

Author: Felix Queißner

build.zig.zon

@@ -1,6 +1,6 @@
 .{
     .name = .disk_image_step,
-    .version = "0.1.0",
+    .version = "2.0.0",
     .fingerprint = 0xdaabde74a06664f7,
     .dependencies = .{
         .zfat = .{

concept/script.dis

@@ -9,7 +9,7 @@ mbr-part
         label AshetOS
         add-dir ../../rootfs .
         add-dir $PATH2 .
-        apps/hello-world.ashex
+        copy-file $PATH3 apps/hello-world.ashex
         copy-file $PATH3 apps/hello-gui.ashex
         copy-file $PATH4 apps/clock.ashex
         copy-file $PATH5 apps/paint.ashex