update documentation and make BaseMiner and BaseMinerAPI unable to be instantiated directly. Add more unittests for miners.

docs/miners/base_miner.md

@@ -0,0 +1,10 @@
+# pyasic
+## Base Miner
+[`BaseMiner`][pyasic.miners.BaseMiner] is the basis for all miner classes, they all subclass (usually indirectly) from this class.
+
+You may not instantiate this class on its own, only subclass from it.  Trying to instantiate an instance of this class will raise `TypeError`.
+
+::: pyasic.miners.BaseMiner
+    handler: python
+    options:
+        heading_level: 4

docs/miners/miner_factory.md

@@ -6,3 +6,15 @@
     options:
         show_root_heading: false
         heading_level: 4
+<br>
+
+## AnyMiner
+::: pyasic.miners.miner_factory.AnyMiner
+    handler: python
+    options:
+        show_root_heading: false
+        heading_level: 4
+
+[`AnyMiner`][pyasic.miners.miner_factory.AnyMiner] is a placeholder type variable used for typing returns of functions.
+A function returning [`AnyMiner`][pyasic.miners.miner_factory.AnyMiner] will always return a subclass of [`BaseMiner`][pyasic.miners.BaseMiner],
+and is used to specify a function returning some arbitrary type of miner class instance.

docs/miners/supported_types.md

@@ -3,8 +3,6 @@
 
 Supported miner types are here on this list.  If your miner (or miner version) is not on this list, please feel free to [open an issue on GitHub](https://github.com/UpstreamData/pyasic/issues) to get it added.
 
-## Miner List
-
 ##### pyasic currently supports the following miners and subtypes:
 * Braiins OS+ Devices:
     * All devices supported by BraiinsOS+ are supported here.