feat: remove make, add just

Makefile

@@ -1,2 +0,0 @@
-default: rss.sh
-	./bin/rss.sh

justfile

@@ -0,0 +1,20 @@
+# list available commands and exit
+default:
+  @just --list --unsorted
+
+# build rss feed
+rss:
+  @./bin/rss.sh
+
+# watch toad.md for changes
+watch:
+  @ls bin/toad.md | entr -c retro bin/toad.md src/00001.txt
+alias dev := watch
+
+# build all comics
+build:
+  #!/usr/bin/env sh
+  for f in $(ls src/*.txt); do
+    base=`basename ${f}`
+    retro bin/toad.md ${f} > "${base/txt/md}"
+  done