feat(php-shim): implement fopen-family stream API on PhpResource

Redesign PhpResource into a real stream handle (File/Memory backing with
tracked position, eof, closed state) and unify the whole fopen family
(fopen/fwrite/fread/fgets/fgetc/feof/fclose/ftell/fseek/rewind/fstat/
ftruncate/fflush and stream_get_contents/stream_copy_to_stream) on
&PhpResource, replacing the split PhpMixed/PhpResource APIs and their
todo!() stubs. fopen now returns Result; read functions stay String for
now (TODO(phase-e) to move to byte strings).

Propagate the signatures through callers: Process stdout/stderr, Cursor
input, curl header/body handles (extracted into typed maps keyed by job
id), Filesystem copy/safe_copy/files_are_equal, BufferIO, error_handler,
platform, perforce, zip. The proc_open pipe paths cannot carry a
PhpResource in a PhpMixed list, so they are left as todo!() with notes.

1 files changed, 8 insertions, 3 deletions

diff --git a/crates/shirabe/src/installer/binary_installer.rs b/crates/shirabe/src/installer/binary_installer.rs
index b9c56f6..8e7ade5 100644
--- a/crates/shirabe/src/installer/binary_installer.rs
+++ b/crates/shirabe/src/installer/binary_installer.rs
@@ -169,9 +169,14 @@ impl BinaryInstaller {
             return "call".to_string();
         }
 
-        let handle = fopen(bin, "r");
-        let line = fgets(handle.clone()).unwrap_or_default();
-        fclose(handle);
+        let line = match fopen(bin, "r") {
+            Ok(handle) => {
+                let line = fgets(&handle, None).unwrap_or_default();
+                fclose(&handle);
+                line
+            }
+            Err(_) => String::new(),
+        };
         let mut m: IndexMap<CaptureKey, String> = IndexMap::new();
         if Preg::is_match3(
             r"{^#!/(?:usr/bin/env )?(?:[^/]+/)*(.+)$}m",