feat: add secret-envs input

Signed-off-by: Elias Lundgren <145569914+elias-lundgren@users.noreply.github.com>

action.yml

@@ -80,6 +80,9 @@ inputs:
   secrets:
     description: "List of secrets to expose to the build (e.g., key=string, GIT_AUTH_TOKEN=mytoken)"
     required: false
+  secret-envs:
+    description: "List of secrets to expose to the build using environment variables (e.g., MY_SECRET=MY_ENV_VAR)"
+    required: false
   secret-files:
     description: "List of secret files to expose to the build (e.g., key=filename, MY_SECRET=./secret.txt)"
     required: false