docs: refresh the homepage supported-models table

[Shi-Dong]

Summary

Supersedes #2271, which GitHub auto-closed when its base branch (#2264's shi/core-features-docs) was deleted on merge — same branch, same review history, now targeting main directly.

Refreshes the Supported models table on the docs homepage (docs/index.md).

• States that the table is not exhaustive — it now highlights recent releases and says explicitly that many more models (including older generations of the same families) run on Miles.
• Adds newly supported models cross-checked against in-tree recipes and open PRs:
  • GLM-5.2 (/models/glm/glm5-2 — the page ships in docs: add GLM-5.2 model page and update supported-models tables #2216; whichever PR lands second takes a trivial table-row rebase)
  • Inkling-Small (/models/thinkingmachines/inkling-small)
  • Nemotron-3-Ultra-550B-A55B (links scripts/run_nemotron_3_ultra_550b_a55b.py; no docs page yet)
  • Gemma-4 26B-A4B and Gemma-4 31B (link their launch scripts; no docs pages yet)
  • JoyAI-LLM-Flash (links scripts/run_joy_ai_llm_flash.py)
  • Kimi-K3 (links Kimi-K3 lora RL day-0 support #1825, which ships scripts/run_kimi_k3.py / run_kimi_k3_lora.py; switch to a docs/script link once it merges)
• Removes models released more than 9 months ago (cutoff ≈ 2025-11-07): DeepSeek-R1, DeepSeek-V3, Qwen3-Next-80B-A3B-Thinking, Qwen3-30B-A3B / 235B-A22B, the Qwen3 dense line, GLM-4.5, GLM-Z1-9B-0414, Kimi-K2-Instruct / Thinking (K2-Thinking, 2025-11-06, misses the cutoff by a day), Moonlight-16B-A3B, MiMo-7B-RL, and gpt-oss-20b. The MiMo and GPT-OSS family rows disappear entirely.

The removed models' recipe pages and launch scripts stay in the repo and in /models/* — only the homepage highlight table shrinks.

Since the intro sentence previously promised a recipe page per model, it now reads "recipe page or launch script" to cover the script-linked rows.

Test plan

• docs/index.md renders correctly in the Mintlify preview
• All /models/... links resolve (GLM-5.2 resolves once docs: add GLM-5.2 model page and update supported-models tables #2216 lands)
• GitHub script links point at existing files on main

[Shi-Dong]

Closing: #2271 was reopened and retargeted to main; it carries the same branch.