Add history-tree to support nyxt

quicklisp · quicklisp · commit fc7ad7f70d87 · 2023-02-14T19:32:43.000-05:00
diff --git a/projects/history-tree/source.txt b/projects/history-tree/source.txt
@@ -0,0 +1 @@
+git https://github.com/atlas-engineer/history-tree.git

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+git https://github.com/atlas-engineer/history-tree.git`