feat(openai): add chat streaming and model commands

- add /openai (/chatgpt) chat command using OpenAI Responses API (streaming + incremental edits)
- add /openAIListModels, /openAIGetModel, /openAISetModel
- introduce base Command class and migrate non-chat commands to it
- wire OpenAI client + env vars (OPENAI_API_KEY, OPENAI_MODEL)
- bump deps (@google/genai, systeminformation, @types/node) and add openai

src/commands/openai-list-models.ts

@@ -0,0 +1,37 @@
+import {Command} from "../base/command";
+import {Requirements} from "../base/requirements";
+import {Requirement} from "../base/requirement";
+import {Message} from "typescript-telegram-bot-api";
+import {openAi} from "../index";
+import {logError, replyToMessage} from "../util/utils";
+
+export class OpenAIListModels extends Command {
+    title = "/openAIListModels";
+    description = "List all OpenAI models";
+
+    requirements = Requirements.Build(Requirement.BOT_CREATOR);
+
+    async execute(msg: Message): Promise<void> {
+        try {
+            const listResponse = await openAi.models.list();
+            console.log(listResponse);
+
+            const modelsString = listResponse.data
+                .map(e => `${e.id}`)
+                .sort((a, b) => a.localeCompare(b))
+                .join("\n")
+                .substring(0, 4000);
+
+            const text = "Доступные модели:\n\n" + "<blockquote expandable>" + modelsString + "</blockquote>";
+
+            await replyToMessage({
+                message: msg,
+                text: text,
+                parse_mode: "HTML"
+            });
+        } catch (e) {
+            logError(e);
+            await replyToMessage({message: msg, text: "Не получилось загрузить список моделей"}).catch(logError);
+        }
+    }
+}