feat: add ability to select requests in runner

[therealrinku]

Description

fixes: #4329

add ability to select requests in collection runner allowing users to run the selected requests only instead of the all the requests in the collection.

Contribution Checklist:

• [x] The pull request only addresses one issue or adds one feature.
• [x] The pull request does not introduce any breaking changes
• [x] I have added screenshots or gifs to help explain the change if applicable.
• [x] I have read the contribution guidelines.
• [x] Create an issue and link to the pull request.

https://github.com/user-attachments/assets/06c23b72-7c0c-415d-a83b-5da1cd3bef1d

[nikischin]

Hi @therealrinku this looks cool on small collections, though I wonder how this would look like in large collection? I doubt it will have the folder hierarchy included with the possibility to select or deselect folders? Please correct me if I am wrong and I would be happy to see a screenshot covering that case.

[helloanoop]

Closing this as this was delivered in #5195