Add commitPrefix for defining a prefix for any project (#3291)

- **PR Description**

Adds a new option `git.comitPrefix` to act similarly to
`git.commitPrefixes`, except, if defined, it applies to any repo that
doesn't have an entry in `git.commitPrefixes`.

- **Please check if the PR fulfills these requirements**

* [x] Cheatsheets are up-to-date (run `go generate ./...`)
* [x] Code has been formatted (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#code-formatting))
* [x] Tests have been added/updated (see
[here](https://github.com/jesseduffield/lazygit/blob/master/pkg/integration/README.md)
for the integration test guide)
* [x] Text is internationalised (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#internationalisation))
* [x] Docs (specifically `docs/Config.md`) have been updated if
necessary
* [x] You've read through your own file changes for silly mistakes etc

1 files changed, 1 insertions, 0 deletions

diff --git a/pkg/integration/tests/test_list.go b/pkg/integration/tests/test_list.go
index cdbcc7871..1c94e3bbd 100644
--- a/pkg/integration/tests/test_list.go
+++ b/pkg/integration/tests/test_list.go
@@ -72,6 +72,7 @@ var tests = []*components.IntegrationTest{
 	commit.CommitMultiline,
 	commit.CommitSwitchToEditor,
 	commit.CommitWipWithPrefix,
+	commit.CommitWithGlobalPrefix,
 	commit.CommitWithPrefix,
 	commit.CreateAmendCommit,
 	commit.CreateTag,