refactor(php-shim): take filesystem paths as impl AsRef<Path>

The shim's filesystem entry points took `&str` even though each one resolves
to a local path through `std::fs` or a syscall, so callers holding a `PathBuf`
had to stringify it at the call site. They now take `impl AsRef<Path>`, the
form `file_exists`, `is_dir`, `unlink` and the rest of the already-converted
set use.

`Phar`, `PharData` and `ZipArchive` keep their archive path as a `PathBuf`.
`PharData::compress` names the compressed sibling by appending the suffix to
the file name rather than formatting the path into a `String`.

Arguments PHP resolves through a stream wrapper (`fopen`, `file_put_contents`,
`include`) still take `&str`, as do the byte-string operations (`dirname`,
`basename`, `pathinfo`) and archive-internal entry names, which are `/`-joined
logical names rather than OS paths.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/crates/shirabe/src/util/tar.rs b/crates/shirabe/src/util/tar.rs
index 792d1c4f..f5b0ebbe 100644
--- a/crates/shirabe/src/util/tar.rs
+++ b/crates/shirabe/src/util/tar.rs
@@ -7,7 +7,7 @@ pub struct Tar;
 
 impl Tar {
     pub fn get_composer_json(path_to_archive: &str) -> anyhow::Result<Option<String>> {
-        let phar = PharData::new(path_to_archive.to_string())?;
+        let phar = PharData::new(path_to_archive)?;
 
         if !phar.valid() {
             return Ok(None);