docs: add strict mode guide and rewrite OPL reference for Keto

[DavudSafarli]

• Adds a new guide what "strict mode" is, why and how to enable it, known breaking patterns with examples, and how to audit your app before enabling.

• Rewrites OPL into a practical how-to guide covering namespaces, relations, subject-set references, and permits, each section with examples.

Summary by CodeRabbit

• Documentation
  • Added a new guide on strict mode for fine-grained permissions in the Keto section.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: d2aaebd3-74b5-4883-9c88-55adf0c0f3d2

📥 Commits

Reviewing files that changed from the base of the PR and between 2bd8659 and 9388873.

⛔ Files ignored due to path filters (2)

• docs/keto/guides/strict-mode.mdx is excluded by !**/*.mdx
• docs/keto/reference/ory-permission-language.mdx is excluded by !**/*.mdx

📒 Files selected for processing (1)

• sidebars-network.ts

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📝 Walkthrough

Walkthrough

This PR adds a single documentation navigation entry to the Keto guides section of the sidebar configuration, linking to the new strict-mode guide under the "Fine-grained Permissions" category.

Changes

Documentation sidebar navigation

Layer / File(s)	Summary
Keto strict-mode guide sidebar entry sidebars-network.ts	Added keto/guides/strict-mode as a new doc item in the Keto "Guides" section.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested reviewers

• aeneasr
• piotrmsc

Poem

🐰 A sidebar grows with guides so new,
The strict-mode path now shines through,
One line, one link, one perfect way,
To help the readers find their day!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description provides a brief summary of the changes (strict mode guide and OPL rewrite) but lacks the required template sections such as 'Related Issue or Design Document' and the PR checklist, both of which are mandatory according to the repository template.	Complete the pull request description by adding the 'Related Issue or Design Document' section and filling out the required checklist items to comply with the repository template.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title mentions adding a strict mode guide and rewriting the OPL reference for Keto, which aligns with the PR objectives of adding documentation for strict mode and rewriting the OPL reference.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch keto-strict-mode

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[Copilot]

Pull request overview

This PR expands Ory Permissions (Keto) documentation by adding a new guide explaining “strict mode” and by rewriting the Ory Permission Language (OPL) reference from a formal specification into a practical, example-driven how-to.

Changes:

• Added a new “Strict mode” guide covering behavior changes, breaking patterns, and readiness checks.
• Reworked the OPL reference page into a structured guide (namespaces, relations, subject sets, permits) with examples.
• Added the new guide to the network sidebar under Keto guides.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
sidebars-network.ts	Adds the new strict mode guide to the Keto guides sidebar list.
docs/keto/reference/ory-permission-language.mdx	Rewrites the OPL reference into a practical guide with examples.
docs/keto/guides/strict-mode.mdx	Introduces a new guide explaining strict mode, expected behavior changes, and audits.

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