docs(README): add todos

Author: realprogrammersusevim

README.md

@@ -5,3 +5,11 @@ This is the code for my website currently hosted at
 files: a binary with the compiled Rust code with some embedded files and
 templates, and a read-only SQLite file with the site content that's made in
 another repo.
+
+## TODO
+
+- [ ] Tagging
+- [ ] Search
+- [ ] Syntax highlighting
+- [ ] Pagination
+- [ ] Global changelog