Cache hashed assets forever in fullstack (#3928)

* Cache hashed assets forever in fullstack

* fix clippy

* fix fullstack test port

* fix fullstack clippy

* fix double insertion of meta in fullstack test

* pull out head element changes

* Fix cli-optimization test when interrupted

* remove tests for raw assets

* fix playwright tests

* look for hash in asset name instead of building a manifest

* undo changes to cli

* fix clippy

* fix test_file_name_looks_immutable

packages/playwright-tests/fullstack/Dioxus.toml

@@ -0,0 +1,3 @@
+[application]
+# resource (public) file folder
+asset_dir = "assets"