graphql: Expose CAPTCHA config and whether password registration is enabled

frontend/schema.graphql

@@ -300,6 +300,27 @@ type BrowserSessionEdge {
   cursor: String!
 }
 
+type CaptchaConfig {
+  """
+  Which Captcha service is being used
+  """
+  service: CaptchaService!
+  """
+  The site key used by the instance
+  """
+  siteKey: String!
+  id: ID!
+}
+
+"""
+Which Captcha service is being used
+"""
+enum CaptchaService {
+  RECAPTCHA_V2
+  CLOUDFLARE_TURNSTILE
+  H_CAPTCHA
+}
+
 """
 A compat session represents a client session which used the legacy Matrix
 login API.
@@ -1414,6 +1435,10 @@ enum SetPrimaryEmailStatus {
 }
 
 type SiteConfig implements Node {
+  """
+  The configuration of CAPTCHA provider.
+  """
+  captchaConfig: CaptchaConfig
   """
   The server name of the homeserver.
   """
@@ -1447,6 +1472,10 @@ type SiteConfig implements Node {
   """
   passwordChangeAllowed: Boolean!
   """
+  Whether passwords are enabled and users can register using a password.
+  """
+  passwordRegistrationEnabled: Boolean!
+  """
   Minimum password complexity, from 0 to 4, in terms of a zxcvbn score.
   The exact scorer (including dictionaries and other data tables)
   in use is <https://crates.io/crates/zxcvbn>.

frontend/src/gql/graphql.ts

@@ -212,6 +212,22 @@ export type BrowserSessionEdge = {
   node: BrowserSession;
 };
 
+export type CaptchaConfig = {
+  __typename?: 'CaptchaConfig';
+  id: Scalars['ID']['output'];
+  /** Which Captcha service is being used */
+  service: CaptchaService;
+  /** The site key used by the instance */
+  siteKey: Scalars['String']['output'];
+};
+
+/** Which Captcha service is being used */
+export enum CaptchaService {
+  CloudflareTurnstile = 'CLOUDFLARE_TURNSTILE',
+  HCaptcha = 'H_CAPTCHA',
+  RecaptchaV2 = 'RECAPTCHA_V2'
+}
+
 /**
  * A compat session represents a client session which used the legacy Matrix
  * login API.
@@ -1063,6 +1079,8 @@ export enum SetPrimaryEmailStatus {
 
 export type SiteConfig = Node & {
   __typename?: 'SiteConfig';
+  /** The configuration of CAPTCHA provider. */
+  captchaConfig?: Maybe<CaptchaConfig>;
   /** Whether users can change their display name. */
   displayNameChangeAllowed: Scalars['Boolean']['output'];
   /** Whether users can change their email. */
@@ -1081,6 +1099,8 @@ export type SiteConfig = Node & {
   passwordChangeAllowed: Scalars['Boolean']['output'];
   /** Whether passwords are enabled for login. */
   passwordLoginEnabled: Scalars['Boolean']['output'];
+  /** Whether passwords are enabled and users can register using a password. */
+  passwordRegistrationEnabled: Scalars['Boolean']['output'];
   /** The URL to the privacy policy. */
   policyUri?: Maybe<Scalars['Url']['output']>;
   /** The server name of the homeserver. */

frontend/src/gql/schema.ts

@@ -529,6 +529,46 @@ export default {
         ],
         "interfaces": []
       },
+      {
+        "kind": "OBJECT",
+        "name": "CaptchaConfig",
+        "fields": [
+          {
+            "name": "id",
+            "type": {
+              "kind": "NON_NULL",
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "Any"
+              }
+            },
+            "args": []
+          },
+          {
+            "name": "service",
+            "type": {
+              "kind": "NON_NULL",
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "Any"
+              }
+            },
+            "args": []
+          },
+          {
+            "name": "siteKey",
+            "type": {
+              "kind": "NON_NULL",
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "Any"
+              }
+            },
+            "args": []
+          }
+        ],
+        "interfaces": []
+      },
       {
         "kind": "OBJECT",
         "name": "CompatSession",
@@ -2570,6 +2610,15 @@ export default {
         "kind": "OBJECT",
         "name": "SiteConfig",
         "fields": [
+          {
+            "name": "captchaConfig",
+            "type": {
+              "kind": "OBJECT",
+              "name": "CaptchaConfig",
+              "ofType": null
+            },
+            "args": []
+          },
           {
             "name": "displayNameChangeAllowed",
             "type": {
@@ -2644,6 +2693,17 @@ export default {
             },
             "args": []
           },
+          {
+            "name": "passwordRegistrationEnabled",
+            "type": {
+              "kind": "NON_NULL",
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "Any"
+              }
+            },
+            "args": []
+          },
           {
             "name": "policyUri",
             "type": {