Move dev widgets to the dedicated folder

dev/aiocolors-widget.lua

@@ -0,0 +1,23 @@
+-- name = "AΙΟ colors"
+-- type = "widget"
+-- description = "Shows colors returned by aio:colors() function"
+--foldable = "true"
+-- author = "Theodor Galanis"
+-- version = "1"
+
+function on_resume()
+  local colors = aio:colors()
+  local colors_strings = stringify_table(colors)
+
+  ui:show_lines(colors_strings)
+end
+
+function stringify_table(tab)
+  local new_tab = {}
+
+  for k,v in pairs(tab) do
+    table.insert(new_tab, k..": "..tostring(v))
+  end
+
+  return new_tab
+end