feat(search): add subcommand to search across the packaging group

Search for an expression across the GitLab packaging group. To use a
filter, include it in your query. You may use wildcards (*) to use glob
matching. Available filters for the blobs scope: path, extension.

Every usage of the search command must be authenticated. Consult the
'pkgctl auth' command to authenticate with GitLab or view the
authentication status.

This command uses bats for pretty printing the results including line
numbers and syntax highlighting.

Component: pkgctl search
Co-authored-by: Christian Heusel <christian@heusel.eu>
Co-authored-by: Levente Polyak <anthraxx@archlinux.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/README.md b/README.md
index a1b6d42..6c36a37 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,7 @@ Component: pkgctl db remove
 - arch-install-scripts
 - awk
 - bash
+- bats
 - binutils
 - coreutils
 - diffutils