feat: structure work

- split files/ into separate dirs
- rename scripts/ to script/, remove .sh extensions
- remove publish scripts, tf module, use github host
- remove unused install files

script/install.d/20-docker.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+docker --version
+
+readonly docker_group="docker"
+if ! grep -q "$docker_group" /etc/group; then
+    echo "Adding docker group"
+    sudo groupadd "$docker_group"
+fi
+
+if ! groups "$USER" | grep -q "\b$docker_group\b"; then
+    echo "Adding user to docker group"
+    sudo usermod -aG docker "$USER"
+fi