Add basic and chardev modules

README.md

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+## Setup env
+
+On NixOS:
+
+- Ensure Linux Kernel is the same as you configuration.
+Otherwise, change linux_dev variable with you kernel variant and change flake.lock nixpkgs with your version.
+- Use direnv allow or nix develop to setup shell.
+
+
+On other distros:
+
+- You need to setup LINUX_MODULES_FOLDER to linux modules folder of your distro (ex: `/lib/modules/$(uname -r)/build`) in flake.nix
+
+## make : targets list
+
+- all : Compiling kernel
+- clean : Cleaning build folder
+
+All subfolder is configured to use LINUX_MODULES_FOLDER env variable set by flake develop
+
+## How test module
+
+Step 1: Load module
+
+```bash
+sudo insmod [module_name].ko
+```
+
+**Warning**: Can fail if secure boot is enabled
+
+Step 2: Check logs
+
+```bash
+sudo dmesg | tail
+```
+
+Step 3: Unload module
+
+```bash
+sudo rmmod [module_name].ko
+```