fix: Pass in params into action

[G-OD]

Description

This fixes an issue where you can't pass system params into a webhook form action.

Steps for reproduction

1. Create a webhook form
2. Define an action with system.params in it
3. Get undefined

Code Review

• hi @kof, I need you to do
  • conceptual review (architecture, feature-correctness)
  • detailed review (read every line)
  • test it on preview

Before requesting a review

• made a self-review
• added inline comments where things may be not obvious (the "why", not "what")

Before merging

• tested locally and on preview environment (preview dev login: 0000)
• updated test cases document
• added tests
• if any new env variables are added, added them to .env file

[kof]

Looking into this, can you please describe a practical use case? for me to better understand what this unlocks

[G-OD]

Looking into this, can you please describe a practical use case? for me to better understand what this unlocks

One use case maybe having to post to another endpoint depending on what URL path you're on. Lets say you have a comment section for a blog post and you have the endpoint /posts/123, and to post a comment you need to post to /posts/123/comment. This would require you to dynamically create the action URL using the data variables (in this case the system params).