Changed . token to _dot

This change allows the dotfiles to work with chezmoi (e.g: on windows)
and improves grepability with neovim/telescope

dot_config/nushell/nu_scripts/modules/base16/README.md

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+# Base16 themes integration
+
+This folder contains a couple of files that let you configure Nushell and other terminal tools to use base16 themes.
+
+## Requirements
+
+Assumes a Linux system with an X-based window manager.
+Specific packages and environment variable requirements are listed in each file.
+
+## Files explanation
+* **base16.nu** - Main module -- see comments inside
+* **auto_base16.nu** - Generates a base16 theme from a wallpaper
+* **alacritty_colors.template** - Template for Alacritty terminal colors
+
+## Example integration
+
+Fist, set up base16 theme generation from a wallpaper:
+```
+# ~/.xinitrc
+
+...
+
+[ -f ~/.auto_base16.nu ] && ~/.auto_base16.nu &
+```
+This will generate a base16 theme to a file from a current wallpaper.
+You can combine this with a random wallpaper generation using the fehbg.nu
+script for more chaos fun.
+
+Next, set up Nushell config, assuming the base16 colors are generated
+```
+# config.nu
+
+use ~/.config/nushell/base16.nu
+
+# File containing base16 colors
+$env.BASE16_TXT = "/tmp/base16.txt"
+
+let config = {
+    color_config: (base16 build-nu-config $env.BASE16_TXT)
+}
+```
+
+To select a new wallpaper and regenerate the base16 config:
+```
+> base16 new-wallpaper
+
+> source ~/.config/nushell/config.nu
+```