feature: add support for a couple alternate models

- Antminer S19j Pro+, ANTMINER
 - Antminer S19 Pro A, VNISH
 - Antminer S19 XP, VNISH
 - Antminer L9, VNISH
 - DG1, ELPHAPEX

 Fixes: #354

docs/miners/antminer/X9.md

@@ -105,6 +105,19 @@
         show_root_heading: false
         heading_level: 0
 
+## L9 (VNish)
+
+- [x] Shutdowns
+- [ ] Power Modes
+- [x] Setpoints
+- [x] Presets
+
+::: pyasic.miners.antminer.vnish.X9.L9.VNishL9
+    handler: python
+    options:
+        show_root_heading: false
+        heading_level: 0
+
 ## T9 (Hive)
 
 - [ ] Shutdowns