Add bip32 support to solana-keygen recover (#17180)

* Fix spelling

* Add validator for  SignerSources

* Add helper to generate Keypair from supporting SignerSources

* Add bip32 support to solana-keygen recover

* Make SignerSourceKind const strs, use for Debug impl and URI schemes

clap-utils/src/input_validators.rs

@@ -96,6 +96,26 @@ where
         .map_err(|err| format!("{}", err))
 }
 
+// Return an error if a `SignerSourceKind::Prompt` cannot be parsed
+pub fn is_prompt_signer_source<T>(string: T) -> Result<(), String>
+where
+    T: AsRef<str> + Display,
+{
+    if string.as_ref() == ASK_KEYWORD {
+        return Ok(());
+    }
+    match parse_signer_source(string.as_ref())
+        .map_err(|err| format!("{}", err))?
+        .kind
+    {
+        SignerSourceKind::Prompt => Ok(()),
+        _ => Err(format!(
+            "Unable to parse input as `prompt:` URI scheme or `ASK` keyword: {}",
+            string
+        )),
+    }
+}
+
 // Return an error if string cannot be parsed as pubkey string or keypair file location
 pub fn is_pubkey_or_keypair<T>(string: T) -> Result<(), String>
 where