feat: alertmanager webhook route

feat: separate routes to module

feat: optionally render commonmark to html for matrix

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

chore: update inputs, Rust 1.85 and 2024 edition

* fmt

feat: initial version