docs: update authz to include StakeAuthorization (cosmos#10821)

Added StakeAuthorization & moved GenericAuthorization to the top.

Co-authored-by: Marko <[email protected]>

x/authz/spec/01_concepts.md

@@ -20,6 +20,16 @@ Authorization is an interface that must be implemented by a concrete authorizati
 
 The Cosmos SDK `x/authz` module comes with following authorization types:
 
+### GenericAuthorization
+
+`GenericAuthorization` implements the `Authorization` interface that gives unrestricted permission to execute the provided Msg on behalf of granter's account.
+
++++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/proto/cosmos/authz/v1beta1/authz.proto#L14-L19
+
++++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/x/authz/generic_authorization.go#L18-L31
+
+- `msg` stores Msg type URL.
+
 ### SendAuthorization
 
 `SendAuthorization` implements the `Authorization` interface for the `cosmos.bank.v1beta1.MsgSend` Msg. It takes a `SpendLimit` that specifies the maximum amount of tokens the grantee can spend. The `SpendLimit` is updated as the tokens are spent.
@@ -30,15 +40,13 @@ The Cosmos SDK `x/authz` module comes with following authorization types:
 
 - `spend_limit` keeps track of how many coins are left in the authorization.
 
-### GenericAuthorization
-
-`GenericAuthorization` implements the `Authorization` interface that gives unrestricted permission to execute the provided Msg on behalf of granter's account.
+### StakeAuthorization
 
-+++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/proto/cosmos/authz/v1beta1/authz.proto#L14-L19
+`StakeAuthorization` implements the `Authorization` interface for messages in the [staking module](https://docs.cosmos.network/v0.44/modules/staking/). It takes an `AuthorizationType` to specify whether you want to authorise delegating, undelegating or redelegating (i.e. these have to be authorised seperately). It also takes a `MaxTokens` that keeps track of a limit to the amount of tokens that can be delegated/undelegated/redelegated. If left empty, the amount is unlimited. Additionally, this Msg takes an `AllowList` and a `DenyList`, which allows you to select which validators you allow grantees to stake with.
 
-+++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/x/authz/generic_authorization.go#L18-L31
++++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/proto/cosmos/staking/v1beta1/authz.proto#L11-L31
 
-- `msg` stores Msg type URL.
++++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/x/staking/types/authz.go#L18-L38
 
 ## Gas