Respect user preferences when formatting timestamp (#7994)

This is a follow up to #7945. The current behaviour reads the locale and
infers from that which type of time format should be used (12 hour/24
hour).
However, in macOS you can override this behaviour, e.g. you can use
en_US locale but still use the 24 hour clock format (Can be customized
under Settings > General > Date & Format > 24-hour time). You can even
customize the date format.

This PR uses the macOS specific `CFDateFormatter` API, which outputs
time format strings, that respect those settings.

Partially fixes #7956 (as its not implemented for linux)

Release Notes:

- Added localization support for all macOS specific date and time
configurations in chat

crates/cli/Cargo.toml

@@ -23,6 +23,6 @@ serde_derive.workspace = true
 util.workspace = true
 
 [target.'cfg(target_os = "macos")'.dependencies]
-core-foundation = "0.9"
+core-foundation.workspace = true
 core-services = "0.2"
 plist = "1.3"