Fix kedro viz --load-file to run from any directory without requiring a Kedro project

[rashidakanchwala]

Description

This PR fixes #2045.

Previously, kedro viz --load-file checked if the command was run from within a Kedro project directory, which is not required. The fix ensures that kedro viz --load-file can run from anywhere as long as it has the correct path the API data directory .

The key behavior is now as follows:

1. If the specified filepath does not exist, a ValueError is raised:

ValueError: The provided filepath 'hellod' does not exist.

2. If the filepath exists but does not contain the expected directory structure (api/main, api/pipelines/, and api/nodes/), a FileNotFoundError is raised:

FileNotFoundError: [Errno 2] No such file or directory: '/path/to/xyz/api/main'

3. If the filepath exists and has the required api directory structure and conent, kedro viz --load-file runs successfully using the API JSON data.

Development notes

QA notes

Checklist

• Read the contributing guidelines
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added new entries to the RELEASE.md file
• Added tests to cover my changes

[SajidAlamQB]

LGTM, thank you @rashidakanchwala!

[Huongg]

hey I'm thinking maybe this kedro_project_path does not need to be defined outside the if-else statement if it is only used within the else block?

[rashidakanchwala]

it is needed later, it is passed to run_server

[Huongg]

I tested it locally and its working as described in the ticket, thanks @rashidakanchwala

[ravi-kumar-pilla]

Hi @rashidakanchwala , The PR looks good. Something not related to the ticket but if possible, can we update the docs here

and here with the directory structure that is needed to run viz when the user does kedro viz --load-file ?

Thank you

[ravi-kumar-pilla]

Left a doc comment but the PR works well... Thank you @rashidakanchwala