docs: layout / structure changes

docs/instructions/setup.md

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+# **Requirements & Settings**
+
+## **Install requirements**
+
+Before running the script for the first time, install the required python packages:
+
+Option 1 - Install `py7z`, `rarfile`
+
+```console
+python -m pip install py7zr rarfile
+```
+
+Option 2 - Install all packages, including `pandas` which is used in [Inspect by hash](../inspect/about.md), using the requirements file
+
+```console
+python -m pip install -r requirements.txt
+```
+
+**Note**: If running on Linux/Mac, you also need to have `unrar` installed in order to be able to extract `.rar` files (applies for both options 1 and 2)
+
+- `sudo apt install unrar` for Linux
+
+- `brew install rar` for Mac
+
+## (Optional) **Edit defaults**
+
+You can change the default settings by editing *utils/settings.py*. The main setting you might want to edit is `IGNORE_DIRS` - the list of names for directories, or files, to ignore when extracting from compressed files.
+
+Ignored directories by default:
+
+- `__MACOSX` (macOS system generated files)
+
+- `.git` (git repo files)
+
+- `node_modules` (npm)
+
+- `vendor` (composer / laravel)