feat: interactive support for comparing action versions

[duedares-rvj]

🔧 Changes

This PR introduces a new auth0 actions diff command to compare code changes between two versions of an Auth0 Action. The command provides an interactive way to select versions and view their differences directly in the CLI.

auth0 actions diff <action-id>

📚 Example

auth0 actions diff 3156cd36-a732-47fa-8dd2-8d58b5e1984f

? Select the first version to compare: 1  
? Select the second version to compare: 2  

Id: example-two (3156cd36-a732-47fa-8dd2-8d58b5e1984f)
--- v1
+++ v2
@@ -1 +1 @@
-function (user, context, callback) { callback(null, { user }); }
+function (temp, context, callback) { callback(null, { temp }); }

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)