Draft: Add ability to duplicate an agent and a flow

What does this MR do and why?

Adds Fork button to agent and flow drawers.

This MR shows 2 options of implementing this feature: Option 1: (commits 1 and 2 of this MR) Allows for forking/duplicating of a agent or flow using URL params (no backend changes needed) as described in #561515 (comment 2713283080)

Option 2: (the current state of this MR) Creates a new route for duplication and passes the :id using this.$route.params.id then uses apollo to fetch the details of the agent/flow

This is a mock up with no tests added yet.

References

Screenshots or screen recordings

Using URL params	Using duplicate route
Screen_Recording_2025-08-27_at_17.22.48	Screen_Recording_2025-08-28_at_15.32.28

How to set up and validate locally

MR acceptance checklist

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Related to #561515 (closed)