Add search history

Add search history for filterable and searchable views.

pkg/gui/context/history_trait.go

@@ -0,0 +1,20 @@
+package context
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/utils"
+)
+
+// Maintains a list of strings that have previously been searched/filtered for
+type SearchHistory struct {
+	history *utils.HistoryBuffer[string]
+}
+
+func NewSearchHistory() *SearchHistory {
+	return &SearchHistory{
+		history: utils.NewHistoryBuffer[string](1000),
+	}
+}
+
+func (self *SearchHistory) GetSearchHistory() *utils.HistoryBuffer[string] {
+	return self.history
+}