feat(archivable-files-finder): wire exclude closure into Finder::filter

Add a Finder::filter(Box<dyn FnMut(&SplFileInfo) -> bool>) stub method and
route the exclude closure through it, matching PHP's ->in()->filter() chain.
FnMut faithfully represents PHP's stateful \Closure.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/crates/shirabe-external-packages/src/symfony/component/finder/finder.rs b/crates/shirabe-external-packages/src/symfony/component/finder/finder.rs
index 6622a9a..9d1e9e6 100644
--- a/crates/shirabe-external-packages/src/symfony/component/finder/finder.rs
+++ b/crates/shirabe-external-packages/src/symfony/component/finder/finder.rs
@@ -44,6 +44,10 @@ impl Finder {
         todo!()
     }
 
+    pub fn filter(&mut self, _closure: Box<dyn FnMut(&SplFileInfo) -> bool>) -> &mut Self {
+        todo!()
+    }
+
     pub fn follow_links(&mut self) -> &mut Self {
         todo!()
     }