tint->dawn: Shuffle source tree in preperation of merging repos

docs/    -> docs/tint/
fuzzers/ -> src/tint/fuzzers/
samples/ -> src/tint/cmd/
src/     -> src/tint/
test/    -> test/tint/

BUG=tint:1418,tint:1433

Change-Id: Id2aa79f989aef3245b80ef4aa37a27ff16cd700b
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/80482
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>

test/tint/bug/fxc/dyn_array_idx/write/function.wgsl.expected.glsl

@@ -0,0 +1,32 @@
+#version 310 es
+
+struct UBO {
+  int dynamic_idx;
+};
+
+layout(binding = 0) uniform UBO_1 {
+  int dynamic_idx;
+} ubo;
+
+struct S {
+  int data[64];
+};
+
+struct Result {
+  int tint_symbol;
+};
+
+layout(binding = 1, std430) buffer Result_1 {
+  int tint_symbol;
+} result;
+void f() {
+  S s = S(int[64](0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
+  s.data[ubo.dynamic_idx] = 1;
+  result.tint_symbol = s.data[3];
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  f();
+  return;
+}