Add pager functionality to the following commands:
- gist list
- pr checks
- release list
- run list
- run view
- secret list
- workflow list
- workflow view
Additionally, normalize error handling when starting the pager has
failed: only print a non-fatal notice to stderr instead of aborting the
whole command.
In the absence of an explicit `--color` setting, or when `--color=auto`
is passed, the pr diff command should fall back to respecting the global
colorization setting as inferred from the environment.
This completely rewrites the PR lookup mechanism so that the caller
must specify the GraphQL fields to query for each PR. Additionally, this
fixes some export problems with `pr view --json`.
Features:
- Each pr command now gets assigned a concept of a Finder. This makes it
easier to stub the PR in tests without having to stub the underlying
HTTP calls or git invocations.
- `pr view --web` is much faster since it only fetches the "url" field.
- `pr diff 123` now skips a whole API call where a whole PR was
unnecessarily preloaded just to access its diff in a subsequent call.
- PullRequestGraphQL query builder is now used to construct queries.
- A bunch of individual commands are now freed of having to know about
concepts such as BaseRepo, Branch, Config, or Remotes.
If the `--repo` flag is specified, then the user intends to select a
repository other than the current one. In that case, it doesn't make
sense to fall back to detecting the PR belonging to the current branch,
so throw a descriptive error instead.
