Print wLDO transfers more nicely in multisig utility

[ruuda]

So far the only transfers we have done, are wLDO transfers. We see a large number where it is difficult to count the zeros. We can improve this by special-casing wLDO.

Diff of target/debug/solido --config mainnet.json multisig show-transaction --transaction-address 3ccNd9MxfroqQ9gmaGQFTt1U65yRsUyiJi1oJhGwaz8E output:

diff --git before.txt after.txt
index 33d2e851..8d719712 100644
--- before.txt
+++ after.txt
@@ -23,9 +23,9 @@ Instruction:
     * GQ3QPrB1RHPRr4Reen772WrMZkHcFM4DL5q44x1BBTFm
       signer: true, writable: false
 
-  This is a Token instruction. It transfers tokens owned by the multisig.
+  This is an SPL token instruction. It transfers tokens.
     Token address: HZRCwxP2Vq9PCpPXooayhJ2bxTpo5xfpQrwB1svh332p
     From address:  T7VpKriUL68aQAKXFyfG3jJjvPHnxaC95XsjaZKSZ7b
     To address:    D89yDDs9dhd82SdM1teiHoH5miZMQ36Unc4r66rKFhVK
-    Amount:        4000000000000, of the token's smallest denomination
+    Amount:        40000.00000000 wLDO (Wormhole-wrapped Lido DAO token)

I also opened #485 to improve this further and add thousand separators and such, but for that it would be nice to have the impl_token! improvements that we have on the anchor-integration branch merged into main first. In the meantime, this is already an improvement.

[enriquefynn]

LGTM!