[openpgp] Improve type annotations

typings/gpg/results.pyi

@@ -6,10 +6,19 @@ class InvalidKey(Result): ...
 class EncryptResult(Result):
     invalid_recipients: list[Any]
 
-class Recipient(Result): ...
+class Recipient(Result):
+    keyid: str
+    pubkey_algo: int
+    status: int
 
 class DecryptResult(Result):
-    recipients: Recipient
+    file_name: str | None
+    is_de_vs: bool
+    is_mime: int
+    legacy_cipher_nomdc: int
+    recipients: list[Recipient]
+    symkey_algo: str
+    wrong_key_usage: bool
 
 class NewSignature(Result): ...
 
@@ -21,10 +30,25 @@ class Notation(Result): ...
 
 class Signature(Result):
     _type = dict(wrong_key_usage=bool, chain_model=bool, is_de_vs=bool)
-    notations: Notation
+    notations: list[Notation]
+    chain_model: bool
+    exp_timestamp: int
+    fpr: str
+    hash_algo: int
+    is_de_vs: bool
+    pka_trust: int
+    pubkey_algo: int
+    status: int
+    summary: int
+    timestamp: int
+    validity: int
+    validity_reason: int
+    wrong_key_usage: bool
 
 class VerifyResult(Result):
-    signatures: Signature
+    file_name: str | None
+    is_mime: int
+    signatures: list[Signature]
 
 class ImportStatus(Result): ...