- Calculate the maximum line width of the reminders output in
`show_reminders.sh`
- Pass the calculated width and a temporary file to the tmux popup in
`main.sh`
- Ensure popup width is at least 40 and does not exceed the tmux window
width
- Improve display by preventing horizontal scrolling and better fitting
content
- Refactor `main.sh` to support `reminders` and `calendar` commands,
displaying tmux popups with localized titles and current date/time.
- Add `show_reminders.sh` and `show_calendar.sh` scripts to render
reminders and 2-week calendar views using `rem`.
- Update `tmux-remind.tmux` to bind `prefix + r` for reminders and
`prefix + c` for calendar popups.
- Improve script robustness with `set -euo pipefail` and dynamic script
directory resolution.
