Port before_v0.60/fuzzy, before_v0.60/ls-mods and before_v0.60/nu_101 (nushell#845)

This PR is part of porting all old scripts nushell#221 and includes a set of
modules:

- fuzzy -> `modules/fuzzy/fuzzy_command_search.nu`
- ls-mods -> `modules/ls-mods`: `ls-less.nu`, `ls-wide.nu` and
`ls-wide-with-color.nu`
- nu_101 -> `modules/nu_101`: `nothing.nu` and `inner_outer_loop.nu`

Edit: `fuzzy` and `nu_101` have been moved to `sourced`

Author: 39555

before_v0.60/fuzzy/fuzzy_command_search.nu

@@ -12,21 +12,17 @@ want to search commands/your history interactively, which is where [fzf](https:/
 `./fuzzy_command_search.nu` searches both commands and subcommands for both a) names and b) their description, and, after pressing `enter`, copies the selected command into the clipboard
 
 To use them in your day-to-day workflow, add 
+
 ```
-[
-    "source <absolute-path-to-nu_script>/fuzzy/fuzzy_history_search.nu", 
-    "source <absolute-path-to-nu_script>/fuzzy/fuzzy_command_search.nu"
-]
+source <absolute-path-to-nu_scripts>/fuzzy/fuzzy_history_search.nu
+source <absolute-path-to-nu_scripts>/fuzzy/fuzzy_command_search.nu
 ```
 
-
-to your `startup` array in you config `.toml`.
+to your `config.nu` 
 
 It's likely a good idea to  also add some short and sweet aliases, e.g.
 
 ```
 alias hi = fuzzy-history-search
 alias hf = fuzzy-command-search
 ```
-
-To your config

before_v0.60/fuzzy/fuzzy_history_search.nu

@@ -0,0 +1,25 @@
+const tablen = 8
+
+# calculate required tabs/spaces to get a nicely aligned table
+def pad-tabs [input_name max_indent] {
+    let input_length = ($input_name | str length) 
+    let required_tabs = $max_indent - ($input_length / $tablen | into int)
+    seq 0 $required_tabs | reduce -f "" {|it, acc| $acc + (char tab)}
+}
+
+# fuzzy search a) commands b) subcommands
+# on selection, will display `help` for the commands
+# and paste command into clipboard for you to paste right away
+
+
+export def fuzzy-command-search [] {
+    let max_len = (help commands | each { $in.name | str length } | math max)
+    let max_indent = ($max_len / $tablen | into int)
+    let command = ((help commands | each {|it|
+        let name = ($it.name | str trim | ansi strip)
+        $"($name)(pad-tabs $name $max_indent)($it.usage)"
+    }) | str join (char nl) | fzf | split column (char tab) | get column1.0)
+    if ($command | is-not-empty) {
+        help $command
+    }
+}

before_v0.60/ls_mods/ls-hidden.nu

@@ -0,0 +1 @@
+export def fuzzy-history-search [] { cat $nu.history-path | fzf | clip }