Re-design output to make skimming easier.

- We now always protect the left margin when printing task details
  (including tags) to make it easier to skim down that line.
- Also made the actual summary always follow immediately after the ID,
  to align to that skimmable line.
- Moved the information about the delegatee to the end of the summary,
  next to the tags, and changed the color of the delegatee to make it
  easier to distinguish.
- Added the `-G` option, to allow filtering out issues matching any of
  the provided tags.
- We now allow options to be passed to both the `delegate` and `help`
  command. Any options are ignored, but this allows the use of tools
  like `cmd_shell` which always wrap commands with the pre-given
  options.

pit.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "4.20.0"
+version       = "4.21.0"
 author        = "Jonathan Bernard"
 description   = "Personal issue tracker."
 license       = "MIT"