Serverless Stack

Before I submit a new issue/request - to confirm, we don’t yet have an enum we can use for permissions using the `grantX` style?

As seen in <https://docs.serverless-stack.com/util/Permissions#access-to-a-list-of-specific-permissions-in-a-construct> as an interface to <https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-dynamodb.Table.html#grantwbrreadwbrdatagrantee>

I love typescript for this, and we do see this pattern all over `sst`, but not seeing anything on roadmap re: perms/grants

One thing I find annoying about CDK is they make enums for everything instead of using string unions which means you have to import a package to specify an option.

Eg the recent:
```app.setDefaultRemovalPolicy(...)```
You have to add another import to pass in the value there instead of just typing in a typechecked string

I would love to create typechecking for permissions so that when you do
```[topic, "..."]```
It type checks the string you pass in to verify it's callable on `topic`