Move to flat config for eslint

[jos-findock]

Is your feature request related to a problem? Please describe.
Eslint has a newer flat config file system. Trying to include the slds plugin and extending the config provided will give an error that the html parser is not passed in the right format.

Describe the solution you'd like
Migrate to the new flat config format

[KishoreNemalipuri]

@jos-findock Thanks for reaching out with this new feature. To set the context, we are currently not support eslint 9 version (there are some dependencies in SF ecosystem at the moment which are preventing us to move in that direction.)

If you are willing to solve it with eslint v8.x, please give us more information and we will try to add this feature.

Also, we are actively working in this space so will update you again when V9 is supported. Thanks.