refactor: ✨ (#418)

* refactor: ✨ move in one commit

Eveything in modules should probably be changed to `exported` defs.
The idea is to move everything first to keep proper history.

* refactor: 📝 add modules readme (wip)

* refactor: ✨ small move

* refactor: 📝 changed nestring, updated modules readme

* refactor: 📝 to document or not to document

* fix: 🐛 themes

replaced the template to use `main` and regenerated them
from lemnos themes.

* Revert "fix: 🐛 themes"

This reverts commit 4918d3633c8d2d81950a0ed0cfd9eb84241bc886.

* refactor: ✨ introduce sourced

- Created a source `root` in which sourcable demos are stored.
  Some might get converted to modules later on.
- Moved some files to bin too.

* fix: 🐛 fehbg.nu

* fix: 🐛 modules/after.nu

* moved some other stuff around

---------

Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>

modules/base16/auto_base16.nu

@@ -0,0 +1,21 @@
+#!/usr/bin/env engine-q
+#
+# ~/.auto_base16.nu
+#
+# This is a wrapper around fehbg.nu that on top of setting a random wallpaper
+# also generates a base16 theme from it.
+#
+# This script is intended to run on desktop startup, e.g., by calling it in
+# ~/.xinitrc.
+#
+# Requirements:
+# 1. go, Python 3, fehbg.nu
+# 2. Install schemer2 from https://github.com/makuto/auto-base16-theme and put
+#    it into your PATH
+# 3. Expected environment variables:
+#   * WALLPAPER_IMG - The wallpaper used for generating the base16 scheme
+#   * BASE16_TXT - Target file to store the generated base16 scheme
+# 4. Both this script and fehbg.nu are expected to be in the home directory as
+#    '~/.auto_base16.nu' and '~/.fehbg.nu'.
+
+schemer2 -format img::colors -in $env.WALLPAPER_IMG -out $env.BASE16_TXT