Reviews for plugin release

[madhushreeray30]

@francois2metz Can you please look into the following and update them:

1. .github folder structure is not as we have for other plugins can you please take reference from this and update it
2. Can you please give demo values that look like real ones for the config variables user and password in config/metabase.spc
3. The credential section is missing the items Radius and Resolution Can you please take reference from here and add them
4. Update the steampipe-plugin-sdk to v5.7.0
5. Do we require the files (.editorconfig, renovate.json) if not we can remove them
6. The docs folder has the files metabase.svg and metabase-social-graphics.png which are no longer needed as we have the social graphics ready, could you please remove them and in the README file update the image to
   ![image](https://hub.steampipe.io/images/plugins/1024pix/metabase-social-graphic.png)

Please reach out to us in case of any doubt, thanks!