Feat - custom code evaluation in UI

[aybruhm]

Description

This PR addresses #569 and introduces the following:

Workflow Summary:

• Users can now easily create and manage custom evaluations.
• The front end provides a user-friendly interface for inputting code and managing evaluations.
• The backend efficiently handles the storage and execution of evaluations.
• The system ensures that users can execute evaluations and view results seamlessly.

Additional Notes:

Making API call(s):

If you plan to make an API call from the code to your local machine, please use Ngrok to tunnel it. Making an API call directly to your local machine from the custom evaluation code will not work due to the security restrictions in place.

Related Issue

Closes #569

[aakrem]

1. Getting this error.
   https://github.com/Agenta-AI/agenta/assets/6608260/b1220883-9137-4d42-a3cb-3f46991abea0

2. @mmabrouk The button to create a custom evaluation is distracting the flow of the other evaluations.
   My suggestions are:

3. Add it as a first item of the dropdown like:
   [List Custom evaluations]
   |_ Create a new custom evaluation (This is a button to redirect to the new evaluation form)
   |_ The items of list..

4. Have it as "Text Button" under the last dropdown.

[aybruhm]

1. Getting this error.
   https://github.com/Agenta-AI/agenta/assets/6608260/b1220883-9137-4d42-a3cb-3f46991abea0
2. @mmabrouk The button to create a custom evaluation is distracting the flow of the other evaluations.
   My suggestions are:
3. Add it as a first item of the dropdown like:
   [List Custom evaluations]
   |_ Create a new custom evaluation (This is a button to redirect to the new evaluation form)
   |_ The items of list..
4. Have it as "Text Button" under the last dropdown.

The error has been fixed.

[aakrem]

@aybruhm There are bugs.

1. Scores are not saved.
2. When we run it again we get errors
   For theses two bugs see this video

Screen.Recording.2023-09-13.at.17.55.23.mov

@MohammedMaaz

1. In this new evaluation we can't see the code we added.
   Please propose a solution the see the code. (editing the code after running the evaluation is not needed)
2. The Button to create a new custom evaluation is distracting the flow to run evaluations.
   Try to put it within the dropdown or as an underlined text button under the dropdown
3. In the evaluations list we see NaN
4. Minor but it looks like the the dropdown to list the evaluations is a different from the dropdown group. when we select another dropdown and then the custom evaluation, both got selected. Check this screenshot:

[MohammedMaaz]

Closed in favor of #610

[MohammedMaaz]

@aybruhm There are bugs.

1. Scores are not saved.
2. When we run it again we get errors
   For theses two bugs see this video

Screen.Recording.2023-09-13.at.17.55.23.mov

@MohammedMaaz

1. In this new evaluation we can't see the code we added.
   Please propose a solution the see the code. (editing the code after running the evaluation is not needed)
2. The Button to create a new custom evaluation is distracting the flow to run evaluations.
   Try to put it within the dropdown or as an underlined text button under the dropdown
3. In the evaluations list we see NaN
4. Minor but it looks like the the dropdown to list the evaluations is a different from the dropdown group. when we select another dropdown and then the custom evaluation, both got selected. Check this screenshot:

All Fixed in #610