feat: optionally render commonmark to html for matrix

feat: optionally read tokens from files

feat: move token to header

chore: comment styling

feat: add --dry-run

feat: use cargo-about to generate a license page

docs: re-license under AGPL-3.0-or-later

fix: tests, we require a service and notifier definition

chore: update inputs, Rust 1.85 and 2024 edition

* fmt

feat: initial version