refactor: commit message

- move issue tracker and commit hash links parsing to view models
- parsing links async
- make sure matched hash is a valid commit oid
- disable `CHILDREN` row in submodule info panel

Signed-off-by: leo <longshuang@msn.cn>

src/Models/InteractiveRebase.cs

@@ -12,6 +12,12 @@ namespace SourceGit.Models
         Drop,
     }
 
+    public class InteractiveCommit
+    {
+        public Commit Commit { get; set; } = new Commit();
+        public string Message { get; set; } = string.Empty;
+    }
+
     public class InteractiveRebaseJob
     {
         public string SHA { get; set; } = string.Empty;