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/make_readme_table.nu

@@ -0,0 +1,32 @@
+# A Script to try and create the table for the readme.md file
+# | Category         | File                                                                          |
+# | ---------------- | ----------------------------------------------------------------------------- |
+# | coloring         | [24bit-1.nu](./coloring\24bit-1.nu)                                           |
+# | coloring         | [color_table.nu](./coloring\color_table.nu)                                   |
+# | coloring         | [color_tables.nu](./coloring\color_tables.nu)                                 |
+# | coloring         | [gradient.nu](./coloring\gradient.nu)                                         |
+
+# Right now there is still manual manipulation in order to update the README.md
+# Hopefully, in the future someone will contribute a script to make this automatic.
+
+let nu_files = (ls **/*.nu)
+let nu_table = ($nu_files |
+    get name |
+    wrap File |
+    insert Category { |it|
+        let cat = ($it.File | path dirname)
+        if $cat == "" {
+            "not assigned yet"
+        } else {
+            $cat
+        }
+    } | where Category !~ ".git" | select Category File | sort-by Category)
+
+# Let's fix the file now
+let nu_table = ($nu_table | update File { |it|
+    let file_path = ($it.File  | into string | str replace '\' '/' --all)
+    let file_name = ($file_path | path basename)
+    $"[($file_name)](char lparen)./($file_path)(char rparen)"
+})
+
+echo $nu_table | to md --pretty