feat: add NVIDIA API provider integration

Add support for NVIDIA's API (https://integrate.api.nvidia.com/v1) with three models:
- nvidia/llama-3.1-nemotron-70b-instruct (default)
- nvidia/llama-3.3-70b-instruct
- nvidia/mistral-nemo-minitron-8b-8k-instruct

Users can configure via NVIDIA_API_KEY environment variable or auth profiles.

Co-authored-by: thesomewhatyou <162917831+thesomewhatyou@users.noreply.github.com>

src/agents/models-config.providers.nvidia.test.ts

@@ -0,0 +1,41 @@
+import { mkdtempSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { describe, expect, it } from "vitest";
+import { resolveImplicitProviders, buildNvidiaProvider } from "./models-config.providers.js";
+
+describe("NVIDIA provider", () => {
+  it("should include nvidia when NVIDIA_API_KEY is configured", async () => {
+    const agentDir = mkdtempSync(join(tmpdir(), "openclaw-test-"));
+    const previous = process.env.NVIDIA_API_KEY;
+    process.env.NVIDIA_API_KEY = "test-key";
+
+    try {
+      const providers = await resolveImplicitProviders({ agentDir });
+      expect(providers?.nvidia).toBeDefined();
+      expect(providers?.nvidia?.apiKey).toBe("NVIDIA_API_KEY");
+    } finally {
+      if (previous === undefined) {
+        delete process.env.NVIDIA_API_KEY;
+      } else {
+        process.env.NVIDIA_API_KEY = previous;
+      }
+    }
+  });
+
+  it("should build nvidia provider with correct configuration", () => {
+    const provider = buildNvidiaProvider();
+    expect(provider.baseUrl).toBe("https://integrate.api.nvidia.com/v1");
+    expect(provider.api).toBe("openai-completions");
+    expect(provider.models).toBeDefined();
+    expect(provider.models.length).toBeGreaterThan(0);
+  });
+
+  it("should include default nvidia models", () => {
+    const provider = buildNvidiaProvider();
+    const modelIds = provider.models.map((m) => m.id);
+    expect(modelIds).toContain("nvidia/llama-3.1-nemotron-70b-instruct");
+    expect(modelIds).toContain("nvidia/llama-3.3-70b-instruct");
+    expect(modelIds).toContain("nvidia/mistral-nemo-minitron-8b-8k-instruct");
+  });
+});