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

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2.0.0",
   "productName": "Drop Desktop Client",
-  "version": "0.3.1",
+  "version": "0.3.1-mac",
   "identifier": "dev.drop.app",
   "build": {
     "beforeDevCommand": "yarn dev --port 1432",