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, 5 insertions, 15 deletions

diff --git a/crates/shirabe-external-packages/src/symfony/console/cursor.rs b/crates/shirabe-external-packages/src/symfony/console/cursor.rs
index 42efff7..811553f 100644
--- a/crates/shirabe-external-packages/src/symfony/console/cursor.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/cursor.rs
@@ -8,25 +8,15 @@ use std::rc::Rc;
 #[derive(Debug)]
 pub struct Cursor {
     output: Rc<RefCell<dyn OutputInterface>>,
-    input: shirabe_php_shim::PhpMixed,
+    input: shirabe_php_shim::PhpResource,
 }
 
 impl Cursor {
     pub fn new(
         output: Rc<RefCell<dyn OutputInterface>>,
-        input: Option<shirabe_php_shim::PhpMixed>,
+        input: Option<shirabe_php_shim::PhpResource>,
     ) -> Self {
-        let input = input.unwrap_or_else(|| {
-            if shirabe_php_shim::defined("STDIN") {
-                // PHP uses the `STDIN` resource constant here, but the shim models it as
-                // `PhpResource` while this field is `PhpMixed` (which has no resource
-                // variant). Fall back to opening `php://input` so the value stays a
-                // PhpMixed stream handle.
-                shirabe_php_shim::fopen("php://input", "r+")
-            } else {
-                shirabe_php_shim::fopen("php://input", "r+")
-            }
-        });
+        let input = input.unwrap_or(shirabe_php_shim::STDIN);
 
         Self { output, input }
     }
@@ -228,10 +218,10 @@ impl Cursor {
         let stty_mode = shirabe_php_shim::shell_exec("stty -g");
         shirabe_php_shim::shell_exec("stty -icanon -echo");
 
-        shirabe_php_shim::fwrite(self.input.clone(), "\x1b[6n", 0);
+        shirabe_php_shim::fwrite(&self.input, "\x1b[6n", None);
 
         let code = shirabe_php_shim::trim(
-            shirabe_php_shim::fread(self.input.clone(), 1024)
+            shirabe_php_shim::fread(&self.input, 1024)
                 .as_deref()
                 .unwrap_or(""),
             None,