Collect start date and reminder state

Already fetch the start date and reminder state for issues immediately
and have them available in the struct Task.

src/util.rs

@@ -1,7 +1,8 @@
 pub fn time_to_jiff(t: time::OffsetDateTime) -> jiff::Zoned {
     let tz = jiff::tz::TimeZone::fixed(jiff::tz::offset(t.offset().whole_hours()));
 
-    jiff::Timestamp::new(t.unix_timestamp(), 0).unwrap()
+    jiff::Timestamp::new(t.unix_timestamp(), 0)
+        .unwrap()
         .to_zoned(tz)
 }