feat(03-05): add Ollama, vLLM, LocalAI, LM Studio, llama.cpp provider YAMLs

- 5 Tier 8 self-hosted runtime provider definitions (keyword-only)
- Localhost endpoints and env var anchors for OSINT correlation
- Dual-located in providers/ and pkg/providers/definitions/

providers/vllm.yaml

@@ -0,0 +1,18 @@
+format_version: 1
+name: vllm
+display_name: vLLM
+tier: 8
+last_verified: "2026-04-05"
+keywords:
+  - "vllm"
+  - "VLLM_API_KEY"
+  - "vllm-openai"
+  - "--api-key"
+  - "openai.api_server"
+  - "vllm.entrypoints"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []