add: NVIDIA NIM (build.nvidia.com) to ai-ml

[Pratiyush]

Service: NVIDIA NIM (build.nvidia.com)

NVIDIA's hosted inference platform with a permanent free tier — found during 2026-04-27 daily scan. Not currently in categories/ai-ml.md.

Free tier (verified 2026-04)

Field	Value
Plan	Free, permanent (NVIDIA Developer Program)
Models	50+ hosted: NVIDIA, Meta (Llama 3/4), Mistral, Microsoft, DeepSeek, Qwen, etc.
Rate limit	~40 RPM per model (varies slightly by model/load)
Credit card	Not required
Auth	Free NVIDIA Developer Program signup → API key (nvapi-...)
Notes	Credit-based system phased out in early 2025; current free tier is rate-limit-only with no per-token billing

Proposed entry (Permanent Free Tiers table in categories/ai-ml.md)

```
| NVIDIA NIM | Free, permanent (Developer Program) | 50+ hosted models (Llama, Mistral, DeepSeek, Qwen, Microsoft, NVIDIA) | ~40 RPM per model | No | 2026-04 | Pricing |
```

Sources

• https://build.nvidia.com/
• https://developer.nvidia.com/blog/access-to-nvidia-nim-now-available-free-to-developer-program-members/
• https://forums.developer.nvidia.com/t/nvidia-nim-api-rate-limit-increase-request-40-200-rpm/368040
• https://costbench.com/software/llm-api-providers/nvidia-nim/free-plan/

Suggested branch / PR

• Branch: `add/nvidia-nim`
• Title: `add: NVIDIA NIM to ai-ml`
• Also bump entry counts in README.md (22 → 23 in ai-ml row, 323 → 324 total) and the Entries badge.

Filed by daily maintenance run 2026-04-27.