docs: polish pass — fix stale names, duplicates, branding, and README

- Normalize 'VLLM' to 'vLLM' in prose across 6 docs (32 occurrences; wikilink
  targets untouched)
- Remove duplicated Environment Variables block in 27B Dankclaw doc
- Update stale model refs Qwen3-30B-A3B -> Qwen3.6-35B-A3B in example commands
- Fix VLLM Index: -- separators to em-dashes; correct model names on links
- README: document active services (ROCmFPX llama-server on Dankclaw, vLLM
  AWQ on Dankserver), replace broken [[docs/README.md]] link with docs/index.md

docs/Running Qwen3.6 27B FP8 on Dankclaw.md

@@ -76,15 +76,6 @@ export HSA_OVERRIDE_GFX_VERSION=11.5.1
 export HF_HOME=/home/dank/.cache/huggingface
 ```
 
-## Environment Variables
-
-Set these for ROCm on Strix Halo:
-
-```
-export HSA_OVERRIDE_GFX_VERSION=11.5.1
-export HF_HOME=/home/dank/.cache/huggingface
-```
-
 ## vLLM Serve Commands
 
 ### Text-Only (Recommended for Memory Savings)