chore(kodiak): adding kodiak config for auto merging and updating (ca…

…rbon-design-system#3167)

This utilizes Kodiak, which is a github app that Carbon team is currently utilizing and appears to work fine. The app has already been enabled in repo settings.

.kodiak.toml

@@ -0,0 +1,31 @@
+# .kodiak.toml
+# full documentation: https://kodiakhq.com/docs/config-reference
+version = 1
+
+[merge]
+# Label to enable Kodiak to merge a PR.
+
+# By default, Kodiak will only act on PRs that have this label. You can disable
+# this requirement via `merge.require_automerge_label`.
+automerge_label = "Ready to merge" # default: "automerge"
+
+# Choose merge method for Kodiak to use.
+#
+# Kodiak will report a configuration error if the selected merge method is
+# disabled for a repository.
+#
+# If you're using the "Require signed commits" GitHub Branch Protection setting
+# to require commit signatures, "merge" or "squash" are the only compatible options. "rebase" will cause Kodiak to raise a configuration error.
+method = "squash" # default: "merge", options: "merge", "squash", "rebase"
+
+[merge.message]
+# By default (`"github_default"`), GitHub uses the title of a PR's first commit
+# for the merge commit title. `"pull_request_title"` uses the PR title for the
+# merge commit.
+title = "pull_request_title" # default: "github_default", options: "github_default", "pull_request_title"
+
+# By default (`"github_default"`), GitHub combines the titles of a PR's commits
+# to create the body text of a merge commit. `"pull_request_body"` uses the
+# content of the PR to generate the body content while `"empty"` sets an empty
+# body.
+body = "pull_request_body" # default: "github_default", options: "github_default", "pull_request_body", "empty"