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/array/function_parameter.wgsl

@@ -0,0 +1,21 @@
+fn f1(a : array<f32, 4>) -> f32 {
+  return a[3];
+}
+
+fn f2(a : array<array<f32, 4>, 3>) -> f32 {
+  return a[2][3];
+}
+
+fn f3(a : array<array<array<f32, 4>, 3>, 2>) -> f32 {
+  return a[1][2][3];
+}
+
+@stage(compute) @workgroup_size(1)
+fn main() {
+  let a1 : array<f32, 4> = array<f32, 4>();
+  let a2 : array<array<f32, 4>, 3> = array<array<f32, 4>, 3>();
+  let a3 : array<array<array<f32, 4>, 3>, 2> = array<array<array<f32, 4>, 3>, 2>();
+  let v1 : f32 = f1(a1);
+  let v2 : f32 = f2(a2);
+  let v3 : f32 = f3(a3);
+}