refactor(vcs): mirror Composer interfaces; rename get_local_changes

- Rename `local_changes` → `get_local_changes` to match Composer's
  `getLocalChanges`
- Add `is_change_report`, `is_vcs_capable_downloader`,
  `is_dvcs_downloader` trait methods to replace PHP `instanceof` checks
- Add `VersionParser` stub to keep `VersionGuesser::new` signature
  compatible with Composer's constructor
- Add `ArrayDumper` in status.rs mirroring
  `Composer\Package\Dumper\ArrayDumper`; expand `build_package_config`
  to include all fields that `VersionGuesser` inspects

1 files changed, 13 insertions, 1 deletions

diff --git a/crates/mozart-vcs/src/downloader/svn.rs b/crates/mozart-vcs/src/downloader/svn.rs
index 533e15a..87b59da 100644
--- a/crates/mozart-vcs/src/downloader/svn.rs
+++ b/crates/mozart-vcs/src/downloader/svn.rs
@@ -51,7 +51,7 @@ impl VcsDownloader for SvnDownloader {
         Ok(())
     }
 
-    fn local_changes(&self, target: &Path) -> Result<Option<String>> {
+    fn get_local_changes(&self, target: &Path) -> Result<Option<String>> {
         if !target.join(".svn").is_dir() {
             return Ok(None);
         }
@@ -72,4 +72,16 @@ impl VcsDownloader for SvnDownloader {
             .execute(&["log", "-r", &range], Some(target))?;
         Ok(output.stdout)
     }
+
+    fn is_change_report(&self) -> bool {
+        true
+    }
+
+    fn is_vcs_capable_downloader(&self) -> bool {
+        true
+    }
+
+    fn is_dvcs_downloader(&self) -> bool {
+        false
+    }
 }