Colors, fuzzy option and finding mode depended sorting

[mkonig]

Sorry that this has multiple changes in one PR.
All changes are done mostly by AI and briefly reviewed by myself.

• Additional to the icons, user can define colors for the list entries
• User can enable/disable fuzzy search with option
  • when in fuzzy mode the current workspace is always on top of the list
  • and the previous is second
  • In normal mode the list stays unchanged so user can easier switch using the alphabet
• Added functions to switch to previous workspace
• No default key binding and switch_to_workspace is public now.

Example:
{ key = 'f', action = act.Multiple { workspace_picker.switch_workspace_action() , 'PopKeyTable' } },
{ key = 'F', action = act.Multiple { workspace_picker.switch_to_previous_workspace(), 'PopKeyTable' } }

{
fuzzy = false,
icons = {
  directory = "",
  worktree = "󰹩",
  zoxide = "󰛕",
  workspace = "󰍹",
}})