feat: get contact-id for info messages (#6714)

instead of showing addresses in info message, provide an API to get the
contact-id.

UI can then make the info message tappable and open the contact profile
in scope

the corresponding iOS PR - incl. **screencast** - is at
https://github.com/deltachat/deltachat-ios/pull/2652 ; jsonrpc can come
in a subsequent PR when things are settled on android/ios

the number of parameters in `add_info_msg_with_cmd` gets bigger and
bigger, however, i did not want to refactor this in this PR. it is also
not really adding complexity



closes #6702

---------

Co-authored-by: link2xt <link2xt@testrun.org>
Co-authored-by: Hocuri <hocuri@gmx.de>

src/contact.rs

@@ -1406,16 +1406,13 @@ impl Contact {
         &self.addr
     }
 
-    /// Get a summary of authorized name and address.
-    ///
-    /// The returned string is either "Name (email@domain.com)" or just
-    /// "email@domain.com" if the name is unset.
+    /// Get authorized name or address.
     ///
     /// This string is suitable for sending over email
     /// as it does not leak the locally set name.
-    pub fn get_authname_n_addr(&self) -> String {
+    pub(crate) fn get_authname_or_addr(&self) -> String {
         if !self.authname.is_empty() {
-            format!("{} ({})", self.authname, self.addr)
+            (&self.authname).into()
         } else {
             (&self.addr).into()
         }