* Add `state` on `Issue` to be able to query the state of an issue even
if you only have a reference to this issue and don't have a reference
to the context or issues table. This does not change the persisted
format of the issue. On disk the state of an issue is still
represented by it's location in the file hierarchy.
* Refactored libpit to use zero_functional instead of sequtils.
- 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.
For example, allow commands like:
# exclude issues from context "abc"
pit list -C abc
# exclude issues delegated to John Doe
pit list -P "delgated-to:John Doe"
