Port P2Pool to Salvium: SC1 address support and Carrot v1 transactions

- Implement SC1 address decode with varint tag parsing
- Add Salvium emission formula (80% PoW, 20% staking)
- Parse Carrot v1 transaction outputs (target.carrot_v1)
- Serialize asset_type, view_tag, encrypted_janus_anchor
- Update display: 8 decimals, SAL ticker
- Skip protocol_tx empty outputs in ZMQ parsing

sidechain_salvium_mini.json

@@ -0,0 +1,8 @@
+{
+        "name": "salvium_mini",
+        "password": "",
+        "block_time": 10,
+        "min_diff": 1000,
+        "pplns_window": 2160,
+        "uncle_penalty": 20
+}

sidechain_salvium_nano.json

@@ -0,0 +1,8 @@
+{
+        "name": "salvium_nano",
+        "password": "",
+        "block_time": 10,
+        "min_diff": 100,
+        "pplns_window": 2160,
+        "uncle_penalty": 20
+}