[emacs] add Borg's layer/essentials current submodules

[~bandali/configs] / lib / diff-hl

diff --git a/lib/diff-hl b/lib/diff-hl
new file mode 160000 (submodule)
index 0000000..190622d
--- /dev/null
+++ b/lib/diff-hl
@@ -0,0 +1 @@
+Subproject commit 190622d3fa2c3237529ec073a8fa00aee06023a1