tracker: single-binary project tracker with auth, api keys, and json api

Go + SQLite web app, server-rendered, hackerman theme. Projects with
descriptions, searchable notes, todo/doing/done task tracking. Bcrypt
login sessions, hashed api keys, full /api/v1 crud. Deploys on straylight
via configs/tracker.nix (prebuilt binary).

.gitignore

@@ -0,0 +1,4 @@
+tracker
+tracker.db
+tracker.db-shm
+tracker.db-wal