[Automated][azure-resource-manager][skip chg] Update ARM documentation for new lint rules

## Summary

- document eight new Azure Resource Manager lint rules across the rules, operations, LRO, resource type, RPC coverage, and versioning guides
- correct ARM resource examples and doc comments to match current library templates and canonical samples
- regenerate ARM reference documentation and record durable guidance for future documentation updates

## Validation

- `pnpm format`
- `pnpm lint`
- ARM package dependency build
- updated TypeSpec example compilation
- `pnpm regen-docs`
- Prettier and CSpell checks

No changelog was added because these are documentation-only changes.

> Generated by [Documentation Update Agent](https://github.com/Azure/typespec-azure/actions/runs/34826696085) · gpt56 · 1.1K AIC · ⌖ 45.6 AIC · ⊞ 19.1K · [◷](https://github.com/search?q=repo%3AAzure%2Ftypespec-azure+%22gh-aw-workflow-id%3A+doc-update%22&type=pullrequests)

---

> [!NOTE]
> This was originally intended as a pull request, but GitHub Actions is not permitted to create or approve pull requests in this repository.
> The changes have been pushed to branch `docs/arm-incremental-20260914-6ce9670280421d1c`.
>
> **[Click here to create the pull request](https://github.com/Azure/typespec-azure/compare/main...docs/arm-incremental-20260914-6ce9670280421d1c?expand=1&title=%5BAutomated%5D%5Bazure-resource-manager%5D%5Bskip%20chg%5D%20Update%20ARM%20documentation%20for%20new%20lint%20rules)**

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Show patch preview (500 of 573 lines)

```diff
From 93ee910861c232cf6193d71fcb5bd6f423210203 Mon Sep 17 00:00:00 2001
X-GH-AW-Base-Commit: 5f4088cb98034d388da0ca32db6c2172103c3abe
From: "github-actions[bot]"
Date: Mon, 14 Sep 2026 09:48:01 +0000
Subject: [PATCH] Update ARM documentation for lint rules

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
.../knowledge/azure-resource-manager.md | 36 ++++++++++++++-
.../azure-resource-manager.meta.json | 4 +-
.../lib/legacy-types/resource.tsp | 2 +-
.../lib/models.tsp | 9 +---
.../content/docs/docs/howtos/ARM/arm-rules.md | 10 ++++-
.../howtos/ARM/long-running-operations.md | 5 ++-
.../docs/howtos/ARM/resource-operations.md | 45 ++++++++++++-------
.../docs/docs/howtos/ARM/resource-type.mdx | 28 +++++++-----
.../howtos/ARM/rpc-guidelines-coverage.md | 39 ++++++++++++----
.../docs/docs/howtos/ARM/versioning.md | 9 ++--
.../reference/data-types.md | 11 ++---
11 files changed, 139 insertions(+), 59 deletions(-)

diff --git a/eng/scripts/doc-updater/knowledge/azure-resource-manager.md b/eng/scripts/doc-updater/knowledge/azure-resource-manager.md
index 601aef43d..8e701c6c4 100644
--- a/eng/scripts/doc-updater/knowledge/azure-resource-manager.md
+++ b/eng/scripts/doc-updater/knowledge/azure-resource-manager.md
@@ -38,7 +38,11 @@ model Employee is TrackedResource {

Rule documentation is authored beside each rule in `packages/typespec-azure-resource-manager/src/rules/*.md` and associated with the rule through its `docs` field. `pnpm regen-docs` passes `--rules-dir ../rules` and generates the website rule pages under `website/src/content/docs/docs/libraries/azure-resource-manager/rules/`. That website directory is ignored by Git and must not be edited manually.

-The `use-relationship-required-properties`, `use-api-version`, `use-operation-decorator`, and `use-interface` rule
... (truncated)
```

Review the ARM documentation files under content/docs/docs/howtos/ARM, the rule knowledge file, and the listed TypeSpec sources and reference data. Run pnpm format, pnpm lint, the ARM package dependency build, updated TypeSpec example compilation, and pnpm regen-docs. Done means the eight lint rules and corrected examples are documented, generated references are current, and all listed checks pass.

Written by the indexing model from the issue text.