Remove file upload functionality and related components

The `FileUploadStore` and all file upload features were removed, simplifying the chat interface. This change eliminates unused code, including file handling logic, attachment management, and UI elements, streamlining the application.

workers/site/sdk/models/cloudflareAi.ts

@@ -13,7 +13,6 @@ export class CloudflareAISdk {
     param: {
       openai: OpenAI;
       systemPrompt: any;
-      disableWebhookGeneration: boolean;
       preprocessedContext: ModelSnapshotType2<
         ModelPropertiesDeclarationToProperties<{
           role: ISimpleType<UnionStringArray<string[]>>;
@@ -21,12 +20,10 @@ export class CloudflareAISdk {
         }>,
         _NotCustomized
       >;
-      attachments: any;
       maxTokens: unknown | number | undefined;
       messages: any;
       model: string;
       env: Env;
-      tools: any;
     },
     dataCallback: (data) => void,
   ) {
@@ -35,22 +32,18 @@ export class CloudflareAISdk {
       messages,
       env,
       maxTokens,
-      tools,
       systemPrompt,
       model,
-      attachments,
     } = param;
 
     const assistantPrompt = ChatSdk.buildAssistantPrompt({
       maxTokens: maxTokens,
-      tools: tools,
     });
     const safeMessages = ChatSdk.buildMessageChain(messages, {
       systemPrompt: systemPrompt,
       model,
       assistantPrompt,
       toolResults: preprocessedContext,
-      attachments: attachments,
     });
 
     const cfAiURL = `https://api.cloudflare.com/client/v4/accounts/${env.CLOUDFLARE_ACCOUNT_ID}/ai/v1`;