feat(metastate): add metastate per community convention

docs/README.rst

@@ -45,6 +45,13 @@ Available states
 .. contents::
    :local:
 
+``salt``
+^^^^^^^^
+
+*Meta-state (This is a state that includes other states)*.
+
+This calls all runable states based on configured pillar data.
+
 ``salt.minion``
 ^^^^^^^^^^^^^^^