add images to README.md in tokenfactory module (#5594)

Co-authored-by: alessandromazza <[email protected]>
Co-authored-by: niilptr <[email protected]>

x/tokenfactory/README.md

@@ -44,6 +44,7 @@ message MsgCreateDenom {
 - Add denom to the `CreatorPrefixStore`, where a state of denoms created per
   creator is kept.
 
+![Schema](/x/tokenfactory/images/CreateDenom.png)
 ### Mint
 
 Minting of a specific denom is only allowed for the current admin.
@@ -66,6 +67,7 @@ message MsgMint {
   - Check that the sender of the message is the admin of the denom
 - Mint designated amount of tokens for the denom via `bank` module
 
+![Schema](/x/tokenfactory/images/Mint.png)
 ### Burn
 
 Burning of a specific denom is only allowed for the current admin.
@@ -88,6 +90,7 @@ message MsgBurn {
   - Check that the sender of the message is the admin of the denom
 - Burn designated amount of tokens for the denom via `bank` module
 
+![Schema](/x/tokenfactory/images/Burn.png)
 ### ChangeAdmin
 
 Change the admin of a denom. Note, this is only allowed to be called by the current admin of the denom.
@@ -100,6 +103,7 @@ message MsgChangeAdmin {
 }
 ```
 
+![Schema](/x/tokenfactory/images/ChangeAdmin.png)
 ### SetDenomMetadata
 
 Setting of metadata for a specific denom is only allowed for the admin of the denom.
@@ -117,6 +121,7 @@ message MsgChangeAdmin {
 - Check that sender of the message is the admin of denom
 - Modify `AuthorityMetadata` state entry to change the admin of the denom
 
+![Schema](/x/tokenfactory/images/SetDenomMetadata.png)
 ## Expectations from the chain
 
 The chain's bech32 prefix for addresses can be at most 16 characters long.