refactor: separate lint shfmt and shellcheck

Makefile

@@ -1,5 +1,12 @@
-.PHONY: check-scripts
-check-scripts:
-	@# Fail if any of these files have warnings
-	find . -type f -not -path "./uncommited/*" -a \( -iname "*.sh" -o -iname "*.tmux" \) | xargs -I % sh -c 'shellcheck %'
-	find . -type f -not -path "./uncommited/*" -a \( -iname "*.sh" -o -iname "*.tmux" \)  | xargs -I % sh -c 'shfmt -l -d %'
+.PHONY: lint_shellcheck
+lint_shellcheck:
+	find . -type f -not -path "./uncommited/*" -a \( -iname "*.sh" -o -iname "*.tmux" \) | \
+	xargs -I % sh -c 'shellcheck %'
+
+.PHONY: lint_shfmt
+lint_shfmt:
+	find . -type f -not -path "./uncommited/*" -a \( -iname "*.sh" -o -iname "*.tmux" \) | \
+	xargs -I % sh -c 'shfmt -l -d %'
+
+.PHONY: check_scripts
+check_scripts: lint_shellcheck lint_shfmt