feat: add floating and docked searchable file picker

src/ruby_host.rb

@@ -30,6 +30,7 @@ module Vamp
       word_next word_previous word_end big_word_next big_word_previous big_word_end
       select copy cut change paste_before paste_after
       select_lines clone_above clone_below select_next skip_occurrence select_all
+      file_picker file_explorer
     ].each do |name|
       action = Action.new("core.#{name}".freeze).freeze
       define_singleton_method(name) { action }
@@ -51,6 +52,7 @@ module Vamp
       @plugins = []
       @bindings = []
       @leader = "space"
+      @file_explorer_side = "right"
     end
 
     def plugin(path)
@@ -66,6 +68,12 @@ module Vamp
       @leader = key
     end
 
+    def file_explorer_side=(side)
+      side = Vamp.string!(side, "file explorer side")
+      raise ArgumentError, "file explorer side must not be empty" if side.empty?
+      @file_explorer_side = side
+    end
+
     def core
       Core
     end
@@ -97,7 +105,8 @@ module Vamp
 
     def response
       { "version" => 1, "type" => "config", "plugins" => @plugins,
-        "bindings" => @bindings, "leader" => @leader }
+        "bindings" => @bindings, "leader" => @leader,
+        "file_explorer_side" => @file_explorer_side }
     end
   end