Time of the day widget added

CHANGELOG.md

README.md

env.example

frontend/css/style.css

frontend/src/main.ts

frontend/templates/active_task.html

frontend/templates/tasks.html

screenshots/active_task.png

screenshots/full_page.png

screenshots/tag-search.png

screenshots/task_search_by_id_text_box.png

screenshots/top_bars.png

src/lib.rs

src/main.rs