fix(v2): truncate docuhash return value in order to avoid ERRNAMETOOLONG error (#4899)

* fix: truncate docuhash return value in order to avoid ERRNAMETOOLONG error

* chore: add deep file path test page to website

* refactor: reorganize docuHash/pathUtils code and tests

* chore: git support longpaths on v2 windows tests workflow

Co-authored-by: slorber <lorber.sebastien@gmail.com>

website/src/pages/deep-file-path-test/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/foo/bar/test-file.md

@@ -0,0 +1,7 @@
+---
+title: Markdown page example
+---
+
+# Markdown page example
+
+You don't need React to write simple standalone pages.