Hints for color-picker in main

Hints

• asv-description-first-word-not-capitalized
  io.github.keshavbhatt.color_picker.metainfo.xml:12 -
  The description line does not start with a capitalized word, project name or number.
• asv-developer-name-tag-deprecated
  io.github.keshavbhatt.color_picker.metainfo.xml:53 -
  The toplevel `developer_name` element is deprecated. Please use the `name` element in a `developer` block instead.
• asv-developer-info-missing
  io.github.keshavbhatt.color_picker.metainfo.xml -
  This component contains no `developer` element with information about its author.