revert back to async_trait since having to use 1.75 because of win7

support

Cargo.toml

@@ -45,6 +45,7 @@ unix-file-copy-paste = [
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+async-trait = "0.1"
 whoami = "1.5.0"
 scrap = { path = "libs/scrap", features = ["wayland"] }
 hbb_common = { path = "libs/hbb_common" }