Add demo test variant

We're piggybacking on our existing integration test framework to record  demos that we can include in our docs

pkg/integration/tests/demo/interactive_rebase.go

@@ -0,0 +1,60 @@
+package demo
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var InteractiveRebase = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Interactive rebase",
+	ExtraCmdArgs: []string{"log"},
+	Skip:         false,
+	IsDemo:       true,
+	SetupConfig: func(config *config.AppConfig) {
+		// No idea why I had to use version 2: it should be using my own computer's
+		// font and the one iterm uses is version 3.
+		config.UserConfig.Gui.NerdFontsVersion = "2"
+	},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateFile("my-file.txt", "myfile content")
+		shell.CreateFile("my-other-file.rb", "my-other-file content")
+
+		shell.CreateNCommitsWithRandomMessages(60)
+		shell.NewBranch("feature/demo")
+
+		shell.CloneIntoRemote("origin")
+
+		shell.SetBranchUpstream("feature/demo", "origin/feature/demo")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.SetCaptionPrefix("Interactive rebase")
+
+		t.Views().Commits().
+			IsFocused().
+			Press(keys.Universal.NextScreenMode).
+			NavigateToLine(Contains("Add TypeScript types to User module")).
+			Press(keys.Universal.Edit).
+			SelectPreviousItem().
+			Press(keys.Universal.Remove).
+			SelectPreviousItem().
+			Press(keys.Commits.SquashDown).
+			SelectPreviousItem().
+			Press(keys.Commits.MarkCommitAsFixup).
+			Press(keys.Universal.CreateRebaseOptionsMenu).
+			Tap(func() {
+				t.ExpectPopup().Menu().
+					Title(Contains("Rebase options")).
+					Select(Contains("continue")).
+					Confirm()
+			}).
+			SetCaptionPrefix("Push to remote").
+			Press(keys.Universal.NextScreenMode).
+			Press(keys.Universal.Push).
+			Tap(func() {
+				t.ExpectPopup().Confirmation().
+					Title(Contains("Force push")).
+					Content(AnyString()).
+					Confirm()
+			})
+	},
+})