refactor: rename project from remind_sync to ical2rem

- Rename executable public_name and package name from remind_sync to
  ical2rem
- Update dune-project with new name, source URI, maintainer, synopsis,
  description, and tags
- Add dune-build-info dependency and use Build_info to generate the
  version string at build time instead of the %%VERSION%% placeholder
- Add pinned dependencies to ical2rem.opam
- Remove remind_sync.opam
- Bump dune lang version from 3.20 to 3.23

dune-project

@@ -1,24 +1,49 @@
-(lang dune 3.20)
+(lang dune 3.23)
 
-(name remind_sync)
+(name ical2rem)
 
 (generate_opam_files true)
 
 (source
- (uri https://git.donadeo.net/pdonadeo/remind-sync))
+ (uri https://git.donadeo.net/pdonadeo/ical2rem))
 
 (authors "Paolo Donadeo <paolo@donadeo.net>")
 
-(maintainers "Maintainer Name <maintainer@example.com>")
+(maintainers "Paolo Donadeo <paolo@donadeo.net>")
 
 (license MIT)
 
-(documentation https://git.donadeo.net/pdonadeo/remind-sync)
+(documentation https://git.donadeo.net/pdonadeo/ical2rem)
 
 (package
- (name remind_sync)
- (synopsis "A short synopsis")
- (description "A longer description")
- (depends ocaml)
+ (name ical2rem)
+ (synopsis "Convert iCalendar (.ics) files to Remind (.rem) format")
+ (description
+  "ical2rem reads iCalendar (.ics) files and produces reminders in the Remind format. It handles recurring events, exceptions (EXDATE/RECURRENCE-ID), alarms (VALARM), timezones, and Windows timezone names.")
+ (depends
+  (ocaml
+   (= 5.4.1))
+  (timedesc
+   (= 3.1.0))
+  (timedesc-tzdb
+   (= 3.1.0))
+  (timedesc-tzlocal
+   (= 3.1.0))
+  (ppx_deriving
+   (= 6.1.1))
+  (icalendar
+   (= 0.1.13))
+  (dune
+   (and
+    :dev
+    (= 3.23.1)))
+  (ocamlformat
+   (and
+    :dev
+    (= 0.29.0)))
+  (ocaml-lsp-server
+   (and
+    :dev
+    (= 1.26.0))))
  (tags
-  ("add topics" "to describe" your project)))
+  (icalendar remind calendar ics rem converter)))