RFR: cli: rename git-status to git-info

[Erik Helin]

Hi all,

please review this patch that renames `git pr status` to `git pr info`. The
patch also adds a bunch flags to `git pr info` for querying information about a
pull request. For example:

$ git pr info 479 --title --url
URL:   https://github.com/openjdk/skara/pull/479
Title: git-pr: add "URL" column to "git pr list"

If no switches are provided, then all information is shown about a pull request:

$ git pr info 479
URL:          https://github.com/openjdk/skara/pull/479
Title:        git-pr: add "URL" column to "git pr list"
Author:       edvbld
Branch:       master
Labels:       cli, ready, rfr
Assignees:    -
Reviewers:    rwestberg
Contributors: -
Status:       READY
Issue:        -
Checks:
- jcheck: OK
Commits:
- 51dd886a: git-pr: add "URL" column to "git pr list"

Testing:
- Manual testing of `git pr info` on Linux x64

Thanks,
Erik

-------------

Commits:
 - e2568069: cli: rename git-status to git-info

Changes: https://git.openjdk.java.net/skara/pull/480/files
 Webrev: https://webrevs.openjdk.java.net/skara/480/webrev.00
  Stats: 697 lines in 5 files changed: 587 ins; 108 del; 2 mod
  Patch: https://git.openjdk.java.net/skara/pull/480.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/480/head:pull/480

PR: https://git.openjdk.java.net/skara/pull/480