refactor: use ajv instead of cafy (#8324)

* wip

* wip

* Update abuse-user-reports.ts

* Update files.ts

* Update list-remote.ts

* Update list.ts

* Update show-users.ts

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* Update update.ts

* Update search.ts

* Update reactions.ts

* Update search.ts

* wip

* wip

* wip

* wip

* Update update.ts

* Update relation.ts

* Update available.ts

* wip

* wip

* wip

* Update packages/backend/src/server/api/define.ts

Co-authored-by: Johann150 <johann.galle@protonmail.com>

* Update define.ts

* Update define.ts

* typo

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* Update update.ts

* wip

* Update signup.ts

* Update call.ts

* minimum for limit

* type

* remove needless annotation

* wip

* Update signup.ts

* wip

* wip

* fix

* Update create.ts

Co-authored-by: Johann150 <johann.galle@protonmail.com>

packages/backend/src/server/api/endpoints/pages/create.ts

@@ -1,7 +1,5 @@
-import $ from 'cafy';
 import ms from 'ms';
 import define from '../../define';
-import { ID } from '@/misc/cafy-id';
 import { Pages, DriveFiles } from '@/models/index';
 import { genId } from '@/misc/gen-id';
 import { Page } from '@/models/entities/page';
@@ -19,51 +17,6 @@ export const meta = {
 		max: 300,
 	},
 
-	params: {
-		title: {
-			validator: $.str,
-		},
-
-		name: {
-			validator: $.str.min(1),
-		},
-
-		summary: {
-			validator: $.optional.nullable.str,
-		},
-
-		content: {
-			validator: $.arr($.obj()),
-		},
-
-		variables: {
-			validator: $.arr($.obj()),
-		},
-
-		script: {
-			validator: $.str,
-		},
-
-		eyeCatchingImageId: {
-			validator: $.optional.nullable.type(ID),
-		},
-
-		font: {
-			validator: $.optional.str.or(['serif', 'sans-serif']),
-			default: 'sans-serif',
-		},
-
-		alignCenter: {
-			validator: $.optional.bool,
-			default: false,
-		},
-
-		hideTitleWhenPinned: {
-			validator: $.optional.bool,
-			default: false,
-		},
-	},
-
 	res: {
 		type: 'object',
 		optional: false, nullable: false,
@@ -84,8 +37,29 @@ export const meta = {
 	},
 } as const;
 
+const paramDef = {
+	type: 'object',
+	properties: {
+		title: { type: 'string' },
+		name: { type: 'string', minLength: 1 },
+		summary: { type: 'string', nullable: true },
+		content: { type: 'array', items: {
+			type: 'object', additionalProperties: true,
+		} },
+		variables: { type: 'array', items: {
+			type: 'object', additionalProperties: true,
+		} },
+		script: { type: 'string' },
+		eyeCatchingImageId: { type: 'string', format: 'misskey:id', nullable: true },
+		font: { type: 'string', enum: ['serif', 'sans-serif'], default: "sans-serif" },
+		alignCenter: { type: 'boolean', default: false },
+		hideTitleWhenPinned: { type: 'boolean', default: false },
+	},
+	required: ['title', 'name', 'content', 'variables', 'script'],
+} as const;
+
 // eslint-disable-next-line import/no-default-export
-export default define(meta, async (ps, user) => {
+export default define(meta, paramDef, async (ps, user) => {
 	let eyeCatchingImage = null;
 	if (ps.eyeCatchingImageId != null) {
 		eyeCatchingImage = await DriveFiles.findOne({