feat(iam): add OpenID Connect SSO with claim-based policy resolution (#1875)

Signed-off-by: houseme <housemecn@gmail.com>
Co-authored-by: houseme <housemecn@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: heihutu <30542132+heihutu@users.noreply.github.com>
Co-authored-by: loverustfs <hello@rustfs.com>
Co-authored-by: 安正超 <anzhengchao@gmail.com>

crates/madmin/src/user.rs

@@ -55,6 +55,8 @@ pub enum UserAuthType {
     Builtin,
     #[serde(rename = "ldap")]
     Ldap,
+    #[serde(rename = "oidc")]
+    Oidc,
 }
 
 #[derive(Debug, Serialize, Deserialize)]