Add zig assembler boilerplate -- does NOTHING lol

zig_assembler/src/main.zig

@@ -0,0 +1,6 @@
+const std = @import("std");
+
+pub fn main() !void {
+    // Prints to stderr, ignoring potential errors.
+    std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
+}

zig_assembler/src/root.zig

@@ -0,0 +1 @@
+const std = @import("std");