Add self-documenting Makefile

This Makefile is quite simple for now. But in the future i plan to
create multiple ansible role skeletons and this Makefile can simplify
the usage of these quite a bit.

I learned about self-documenting Makefiles from Sheo's Blog [1] and the
referenced article from Victoria Drake [2].

[1] https://shivering-isles.com/til/2021/05/self-documenting-makefiles
[2] https://victoria.dev/blog/how-to-create-a-self-documenting-makefile/

.editorconfig

@@ -9,6 +9,9 @@ indent_style = space
 indent_size = 4
 trim_trailing_whitespace = true
 
+[Makefile]
+indent_style = tab
+
 [*.md]
 insert_final_newline = false
 trim_trailing_whitespace = false

Makefile

@@ -0,0 +1,12 @@
+SHELL := /bin/bash
+.POSIX:
+.PHONY: help lint install
+
+help: ## Show this help
+	@egrep -h '\s##\s' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
+
+lint: ## Lint ansible files with ansible-lint
+	ansible-lint
+
+install: ## Install or update requirements
+	ansible-galaxy install -f -r requirements.yml