[DOCS] Add additional l1.rpckind details

[sbvegan]

Brief Description of the Docs Request

l1.rpckind details

Description of the Documentation You'd Like

Add a callout to the l1.rpckind that gives details on the different values: https://github.com/ethereum-optimism/optimism/blob/844cc20084a2e9716631b4092ce7eca4804a8e0a/op-service/sources/receipts_rpc.go#L239-L322

Links to Related Pages

https://docs.optimism.io/builders/node-operators/management/configuration#l1rpckind

Additional Context

Provide any additional context about this documentation request. What problems did you run into that caused you to make this request?
Which existing documentation pages did you already try as a solution to your problem? Why do you think the requested page(s) will be beneficial to developers in the Optimism Collective?