macOS app signing (#95)

* feat: add macos signing args

* fix: update all versions to -mac specific

* fix: fetch signing identity

* feat: add signing pre-steps like the docs say

* fix: remove apple requirement from signing

* fix: add drop cert to keychain when signing

* fix: add drop.pem to add-trusted-cert

* fix: re-order and specify import operation

* fix: let's try the user store

* fix: password required to update trust

* fix: try another non-interactive fix

* fix: try sudo

* fix: revert attempt fix

* fix: add cert id debug

* fix: attempt to use id rather than name

* fix: revert code id to name

desktop/src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "drop-app"
-version = "0.3.1"
+version = "0.3.1-mac"
 description = "The client application for the open-source, self-hosted game distribution platform Drop"
 authors = ["Drop OSS"]
 edition = "2024"