git: Update serialization for copied files — radicle-git

Instead of always trying to provide a diff, we should serialize the same way we do for moved files.

         S: Serializer,
     {
         if self.old == self.new {
             let mut state = serializer.serialize_struct("Moved", 2)?;
             let mut state = serializer.serialize_struct("Moved", 3)?;
             state.serialize_field("oldPath", &self.old_path)?;
             state.serialize_field("newPath", &self.new_path)?;
             state.serialize_field("current", &self.new)?;

 }
 /// A file that was copied within a [`Diff`].
 #[cfg_attr(feature = "serde", derive(Serialize), serde(rename_all = "camelCase"))]
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct Copied {
     /// The old path to this file, relative to the repository root.

     pub diff: DiffContent,
 }
 #[cfg(feature = "serde")]
 impl Serialize for Copied {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
         S: Serializer,
     {
         if self.old == self.new {
             let mut state = serializer.serialize_struct("Copied", 3)?;
             state.serialize_field("oldPath", &self.old_path)?;
             state.serialize_field("newPath", &self.new_path)?;
             state.serialize_field("current", &self.new)?;
             state.end()
         } else {
             let mut state = serializer.serialize_struct("Copied", 5)?;
             state.serialize_field("oldPath", &self.old_path)?;
             state.serialize_field("newPath", &self.new_path)?;
             state.serialize_field("old", &self.old)?;
             state.serialize_field("new", &self.new)?;
             state.serialize_field("diff", &self.diff)?;
             state.end()
         }
     }
 }
 #[cfg_attr(feature = "serde", derive(Serialize), serde(rename_all = "camelCase"))]
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum EofNewLine {

 #[cfg_attr(
     feature = "serde",
     derive(Serialize),
     serde(tag = "state", rename_all = "camelCase")
     serde(tag = "status", rename_all = "camelCase")
 )]
 pub enum FileDiff {
     Added(Added),

                 "mode": "blob",
                 "oid": "02f70f56ec62396ceaf38804c37e169e875ab291",
             },
             "state": "added"
             "status": "added"
         },
         {
             "path": "README.md",

                 "mode": "blob",
                 "oid": "5e07534cd74a6a9b2ccd2729b181c4ef26173a5e",
             },
             "state": "modified",
             "status": "modified",
         },
         {
             "current": {

             },
             "oldPath": "text/emoji.txt",
             "newPath": "emoji.txt",
             "state": "moved"
             "status": "moved"
         },
         {
             "diff": {
                 "eof": "noneMissing",
                 "hunks": [],
                 "stats": {
                     "additions": 0,
                     "deletions": 0,
                 },
                 "type": "plain",
             },
             "new": {
             "current": {
                 "mode": "blob",
                 "oid": "5e07534cd74a6a9b2ccd2729b181c4ef26173a5e",
             },
             "newPath": "file_operations/copied.md",
             "old": {
                 "mode": "blob",
                 "oid": "5e07534cd74a6a9b2ccd2729b181c4ef26173a5e",
             },
             "oldPath": "README.md",
             "state": "copied"
             "status": "copied"
         },
         {
             "path": "text/arrows.txt",
             "state": "deleted",
             "status": "deleted",
             "old": {
                 "mode": "blob",
                 "oid": "95418c04010a3cc758fb3a37f9918465f147566f",