fix: adjust to `rr`'s vFile reply (#2850)

* fix: adjust to `rr`'s vFile reply

`rr replay` use `"F-01,2"` to indicate a vFile error while pwndbg
detects `"F-1,"`. Patch the code to process some cases like `rr`.

* edit: add a ` ` to satisfy lint.

* aglib.file: apply to potential `"errno;attachment"`

* edit: satisfy reviewdog

* aglib.file: skip `attachment` when parsing vFile

> F result [,errno] [;attachment]

`attachment` is what we don't need, strip it before parsing result and
errno

* aglib.file: remove duplicated split

pwndbg/aglib/file.py

@@ -170,9 +170,14 @@ def is_vfile_qemu_user_bug() -> bool:
 def _vfile_check_response(response: bytes):
     if len(response) == 0:
         raise NotImplementedError("Not supported")
-    if response.startswith(b"F-1,"):
-        errno = int(response[4:].decode(), 10 if is_vfile_qemu_user_bug() else 16)
-        raise OSError(errno, "Error")
+    # F result [,errno] [;attachment]; strip attachment first, skip if no errno
+    result_errno = response.split(b";", 1)[0]
+    if result_errno.startswith(b"F") and b"," in result_errno:
+        result, errno = result_errno[1:].split(b",", 1)  # Skip "F"
+        if int(result) != -1:
+            raise NotImplementedError(f"Unknown response status {result!r}")
+        err = int(errno, 10 if is_vfile_qemu_user_bug() else 16)
+        raise OSError(err, "Error")
 
 
 def vfile_readlink(pathname: str | bytes) -> bytes: