BREAKING: Unify lua and plug API mappings

Made the names of the functions to invoke the plugin the same.
This is a BREAKING change if using the lua mappings.

On the other hand, it should stay pretty stable for the foreseeable
future, with only new ones added and possibly vim commands added.

lua/zettelkasten/init.lua

@@ -17,26 +17,26 @@ end
 function ZK.get_anchor() return anchor.create() end
 
 -- Open link under cursor, or next on line
-function ZK.open_link() return action.open_selected() end
+function ZK.link_open() return action.open_selected() end
 
 -- Create a new link under cursor
-function ZK.make_link(visual) return action.make_link(visual) end
+function ZK.link_make(visual) return action.make_link(visual) end
 
 -- If invoked in reach of a valid link will try to follow said link.
 -- Otherwise will take the current context and make a link out of it.
-function ZK.open_or_make_link(visual)
-    if not ZK.open_link() then ZK.make_link(visual) end
+function ZK.link_follow(visual)
+    if not ZK.link_open() then ZK.link_make(visual) end
 end
 
 -- Open index file at zettel root directory. If title is passed in opens
 -- `title`.<extension> file, otherwise defaults to `index`.<extension>.
-function ZK.open_index(title) return action.open_index_file(title) end
+function ZK.index_open(title) return action.open_index_file(title) end
 
 return {
     get_zettel_list = ZK.get_zettel_list,
     get_anchor = ZK.get_anchor,
-    open_link = ZK.open_link,
-    make_link = ZK.make_link,
-    open_or_make_link = ZK.open_or_make_link,
-    open_index = ZK.open_index
+    link_open = ZK.link_open,
+    link_make = ZK.link_make,
+    link_follow = ZK.link_follow,
+    index_open = ZK.index_open
 }