add input methdod framework (add sitelen pona input)

Also change audio player randomness source to /dev/urandom which is way better for the prng we are using

docs/system/input_methods.md

@@ -0,0 +1,15 @@
+Use the shortcut Alt+<Space> to switch between the input methods.
+
+## Current Input Methods
+
+### LAT
+
+Directly passes all keyboard inputs without any extra processing.
+
+### TOK: Toki Pona
+
+Intercepts all latin letters used in Toki Pona, stores it in buffer. Press enter to turn buffer into Sitelen Pona characters. Press delete to clear buffer.
+
+󱤿󱥁󱤧󱤆󱤉󱥂󱥍󱥬Lasina󱥩󱥠󱥔
+󱤑󱤧󱥠󱤉󱥂󱥍󱥬Lasina󱤡󱤿󱥁󱤧󱥌󱤉󱥂󱥩󱥓
+󱤑󱤧󱥠󱤉󱥂Enter󱤡󱥂󱥍󱤏󱥓󱤧󱤖󱥠󱥔

docs/system/shortcuts.md

@@ -6,6 +6,7 @@
 - Alt+c: Centre window
 - Alt+f: Fullscreen window
 - Alt+w: Half width window
+- Alt+<Space>: Switch keyboard input method (switch language)
 - Alt+C: Clipboard copy
 - Alt+P: Clipboard paste
 - Alt+h: Move window left