Revert "fix(build): don’t run git add when linting"

This reverts commit 4d9ea38.

We need the git add otherwise the prettier changes wont be added to the commit

[ci skip]

.lintstagedrc.json

@@ -1,3 +1,3 @@
 {
-  "*.ts": ["prettier --write"]
+  "*.ts": ["prettier --write", "git add"]
 }