Expose axis target + clean up

Closes #4 (closed)

Closes daiquiri-ui#9 (closed)

This MR mainly expose axis motion target as property of axis + bug fixes

• Fixes BLISS event registration (the Daiquiri name was used)
• Fixes event value =0 not emitted due to an old workaround on the BLISS event handling
• Clean up few text concatenation
  • Use f"" instead of format
  • Use %s with logging to avoid early concatenation of strings
• Finally expose _set_position as target property