feat: documentation stuff

ReadMe.md

@@ -19,5 +19,8 @@ This whole folder is for the most part just a system to clean up importing
   - The [components](system_profiles/components) directory:
     - Should never import anything from this repository
     - It can import things from nixpkgs
-    - Should set only basic "system" settings
+    - Should set only basic "system" wide settings
       ("system" is not well defined)
+      NixOS has profiles this should be a similar concept to them
+      - [NixOS profiles](https://github.com/NixOS/nixpkgs/tree/master/nixos/modules/profiles)
+      - [NixOS manual on profiles](https://nixos.org/manual/nixos/stable/#ch-profiles)

docs/notes/ReadMe.md

@@ -0,0 +1,4 @@
+# Not a source of checked sources
+This folder is just notes in the process of learning nix stuff
+It by no means was really checked for correctness
+*You have been warned*

docs/notes/my understanding of nix terms.md

@@ -0,0 +1,45 @@
+# My understanding of nix terms
+
+## The nix trinity
+
+### nix
+
+Is "just" a package manager + programming language attached to it. It is not necessarily connected to *nixpkgs* or *NixOS*. You could just create your own package repository and or distro. The package manager can also run standalone on basically any distro without needing something like NixOS.
+
+### nixpkgs
+
+A git repository with loads of recipes of packages and tools to build them more easily.
+
+- The `lib` that you "import" like this `{lib, ...}: {}` is coming from here.
+- it also technically contains *NixOS* though it is mostly separate, there are some shared parts, but no dependencies as far as i know
+
+### NixOS
+
+A distro build upon nix and nixpkgs. It lives in the same repo as *nixpkgs*
+
+- Houses tools like `nixos-rebuild`
+- And `switch-to-configuration` framework
+
+## Other big concepts
+
+### flakes
+
+The term is not just used for the new file layout, but also the *new cli* around it. *Flakes* try to go after more "purity". For example with flakes the `inputs` (read where to download sources) and replaces channels by it.
+
+- One of the Benefit is that you get a `flake.lock` file in which the sources are locked via various ways (git commit, hash, etc).
+  Beforehand channels where handled system wide and so developers had different versions again ...
+- My suggestion use flakes and therefor avoid `fetch` commands and registry syntax with `<nixpkgs>` (a registry is basically just a naming system (dns) and i **think** `<nixpkgs>` would just point to your local channel and the end of the chain)
+
+### new cli
+
+As mentioned before with the flakes there also comes a new cli, mostly seperate tools new are part of nix
+
+| Old            | New             |
+| -------------- | --------------- |
+| nix-shell      | nix shell       |
+| nix-store      | nix store       |
+| ...            | ...             |
+
+- [nix manual on new cli](https://nix.dev/manual/nix/2.28/command-ref/new-cli/nix)
+- [nix wiki on new cli](https://wiki.nixos.org/wiki/Nix_(command))
+