Fix outdir not work when run dx bundle --platform web --outdir mydir (#3572)

* Make legacy asset dir optional
* properly implement outdir

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>
Co-authored-by:  Nathy-bajo <bajon7680@gmail.com>

Cargo.lock

@@ -2855,6 +2855,19 @@ dependencies = [
  "itertools 0.10.5",
 ]
 
+[[package]]
+name = "crossbeam"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1137cd7e7fc0fb5d3c5a8678be38ec56e819125d8d7907411fe24ccb943faca8"
+dependencies = [
+ "crossbeam-channel",
+ "crossbeam-deque",
+ "crossbeam-epoch",
+ "crossbeam-queue",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.13"
@@ -3478,6 +3491,7 @@ dependencies = [
  "dioxus-rsx",
  "dioxus-rsx-hotreload",
  "dioxus-rsx-rosetta",
+ "dircpy",
  "dirs",
  "dunce",
  "env_logger 0.11.5",
@@ -4242,6 +4256,17 @@ dependencies = [
  "tower-http",
 ]
 
+[[package]]
+name = "dircpy"
+version = "0.3.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a88521b0517f5f9d51d11925d8ab4523497dcf947073fa3231a311b63941131c"
+dependencies = [
+ "jwalk",
+ "log",
+ "walkdir",
+]
+
 [[package]]
 name = "dirs"
 version = "5.0.1"
@@ -7206,6 +7231,16 @@ dependencies = [
  "simple_asn1",
 ]
 
+[[package]]
+name = "jwalk"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2735847566356cd2179a2a38264839308f7079fa96e6bd5a42d740460e003c56"
+dependencies = [
+ "crossbeam",
+ "rayon",
+]
+
 [[package]]
 name = "jzon"
 version = "0.12.5"