Removing event grid client package

[jayendranarumugam]

Addressing #12

• I created this PR on top of Added Github Actions #15 . So please merge the it before approving this PR.

Few things to consider in this PR:

• I've assumed that the TopicEndpoint will be provided with the api-version, which means the config settings will looks like

{
"EventGridBindingSampleTopicEndpoint": "https://<name>.eventgrid.azure.net/api/events?api-version=2018-01-01"
}

• I've created a new model called EventGridModel by inheriting the Event class. so that existing code won't break

[Jandev]

Looking great!

I've assumed that the TopicEndpoint will be provided with the api-version, which means the config settings will looks like

I'm fine with this, can you update the Readme with this, so it'll be clear to the users of the binding?

I'll do some testing & will probably push this as a 1.0 release once merged.

[jayendranarumugam]

I've updated the readme with the settings. Please check and let me know if anything needs to address