Port root before_v0.60/*.nu scripts (issue #221) (#837)

This PR is part of porting all old scripts #221 and ports all root
`before_v0.60/*.nu` scripts to `modules/*.nu`

modules/lint_directories.nu

@@ -0,0 +1,16 @@
+# List any directory that does not follow a SemVer naming pattern
+# For example
+# - 1.0.1 is a valid directory name.
+# - yeah_whatever_linter is not a valid directory name.
+def ls-incorrect-dirs [] {
+    ls | where type == dir and name != 'scripts' | find --invert --regex '(\d+\.){2,}\d$' --columns [name]
+}
+let incorrect_count = (ls-incorrect-dirs | length);
+if $incorrect_count > 0 {
+    print $"The following directories are named incorrectly: (char newline)"
+    print (ls-incorrect-dirs)
+    exit 1
+
+} else {
+    exit 0
+}