feat(query_group): add methods for DRep and gov action deposits

- Added `get_drep_deposit` method to retrieve DRep deposit amount.
- Added `get_gov_action_deposit` method to retrieve governance action
  deposit amount.

Author: mkoura

cardano_clusterlib/query_group.py

@@ -287,6 +287,16 @@ def get_pool_deposit(self) -> int:
         pparams = self.get_protocol_params()
         return pparams.get("stakePoolDeposit") or 0
 
+    def get_drep_deposit(self) -> int:
+        """Return DRep deposit amount."""
+        pparams = self.get_protocol_params()
+        return pparams.get("dRepDeposit") or 0
+
+    def get_gov_action_deposit(self) -> int:
+        """Return governance action deposit amount."""
+        pparams = self.get_protocol_params()
+        return pparams.get("govActionDeposit") or 0
+
     def get_stake_distribution(self) -> dict[str, float]:
         """Return current aggregated stake distribution per stake pool."""
         # Stake pool values are displayed starting with line 2 of the command output