feat: Support multiple commit prefixes

This implementation, unlike that proposed in https://github.com/jesseduffield/lazygit/pull/4253
keeps the yaml schema easy, and does a migration from the single
elements to a sequence of elements.

pkg/config/app_config_test.go

@@ -0,0 +1,78 @@
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+)
+
+func TestCommitPrefixMigrations(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			"Empty String",
+			"",
+			"",
+		}, {
+			"Single CommitPrefix Rename",
+			`
+git:
+  commitPrefix:
+     pattern: "^\\w+-\\w+.*"
+     replace: '[JIRA $0] '`,
+			`
+git:
+  commitPrefix:
+    - pattern: "^\\w+-\\w+.*"
+      replace: '[JIRA $0] '`,
+		}, {
+			"Complicated CommitPrefixes Rename",
+			`
+git:
+  commitPrefixes:
+    foo:
+      pattern: "^\\w+-\\w+.*"
+      replace: '[OTHER $0] '
+    CrazyName!@#$^*&)_-)[[}{f{[]:
+      pattern: "^foo.bar*"
+      replace: '[FUN $0] '`,
+			`
+git:
+  commitPrefixes:
+     foo:
+       - pattern: "^\\w+-\\w+.*"
+         replace: '[OTHER $0] '
+     CrazyName!@#$^*&)_-)[[}{f{[]:
+       - pattern: "^foo.bar*"
+         replace: '[FUN $0] '`,
+		}, {
+			"Incomplete Configuration",
+			"git:",
+			"git:",
+		},
+	}
+
+	for _, s := range scenarios {
+		t.Run(s.name, func(t *testing.T) {
+			expectedConfig := GetDefaultConfig()
+			err := yaml.Unmarshal([]byte(s.expected), expectedConfig)
+			if err != nil {
+				t.Error(err)
+			}
+			actual, err := computeMigratedConfig("path doesn't matter", []byte(s.input))
+			if err != nil {
+				t.Error(err)
+			}
+			actualConfig := GetDefaultConfig()
+			err = yaml.Unmarshal(actual, actualConfig)
+			if err != nil {
+				t.Error(err)
+			}
+			assert.Equal(t, expectedConfig, actualConfig)
+		})
+	}
+}