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/README.md

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+# Nushell Scripts
+
+This is a place to share Nushell scripts with each other. If you'd like to share your scripts, fork this repository, and [create a PR](https://github.com/nushell/nu_scripts/compare) that adds it to the repo.
+
+## Sections
+
+- [aliases](./aliases/)
+- [benchmarks](./benchmarks/)
+- [cool-oneliners](./sourced/cool-oneliners/)
+- [custom-completions](./custom-completions/) - collection of custom completions for external commands.
+- [custom-menus](./custom-menus/) - collection of custom nushell menus
+- [example-config](./example-config/)
+- [nu-hooks](./nu-hooks/)
+- [modules](./modules/) - This has its dedicated [readme](./modules/README.md)
+- [nu_101](./sourced/nu_101/) - Beginner introduction to nushell concepts.
+- [prompt](./modules/prompt/)
+- [themes](./themes/)
+
+## Running Scripts
+
+You can run nushell scripts in a few different ways.
+
+1. You can type `nu <script name>`.
+2. From with nushell, you can type `source <script name>` and if the script is just a bunch of commands it will run the script. If the script is a custom command it will load those custom commands into your current scope so you can run them like any other command.