Basic setup for examples

examples/build.zig

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+const std = @import("std");
+const Builder = std.build.Builder;
+const FmtStep = std.build.FmtStep;
+const vkgen = @import("../generator/generate.zig");
+
+pub fn generateVk(b: *Builder) []const u8 {
+    const spec = std.fs.cwd().readFileAlloc(b.allocator, "vk.xml", std.math.maxInt(usize)) catch unreachable;
+    const output = std.fs.path.join(
+        b.allocator,
+        &[_][]const u8{b.cache_root, "vk.zig"},
+    ) catch unreachable;
+
+    const output_file = std.fs.cwd().openFile(output, .{}) catch unreachable;
+    defer output_file.close();
+    vkgen.generate(b.allocator, spec, output_file.writer());
+
+    return output;
+}
+
+pub fn build(b: *Builder) void {
+    const target = b.standardTargetOptions(.{});
+
+    const mode = b.standardReleaseOptions();
+
+    const exe = b.addExecutable("example", "src/main.zig");
+    exe.setTarget(target);
+    exe.setBuildMode(mode);
+    exe.install();
+
+    const vk_path = generateVk(b);
+    const fmt_step = b.addFmt(&[_][]const u8{vk_path});
+    exe.step.dependOn(&fmt_step.step);
+
+    const run_cmd = exe.run();
+    run_cmd.step.dependOn(b.getInstallStep());
+
+    const run_step = b.step("run", "Run the app");
+    run_step.dependOn(&run_cmd.step);
+}