chore(docs): document --json flag

[comatory]

Description

Documents the new --json flag feature: wundergraph/cosmo#2590

Summary by CodeRabbit

• Documentation
  • Added --json and --out options to the monograph check docs, with examples showing JSON output and writing results to a file for automation.
  • Added --json and --out options to the subgraph check docs, including step-by-step examples and JSON output samples for automated workflows.

Checklist

• I have validated my changes locally using mintlify dev
• I have validated my changes are working as expected by looking at the preview deployment
• All links in my documentation work correctly
• All images render properly
• Code examples are tested and formatted correctly
• If I added new pages, they are included in the navigation (docs.json) (n/a)

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 9b9fbcda-0d66-4f3b-b669-f29c23b10b1e

📥 Commits

Reviewing files that changed from the base of the PR and between 6ae26a0 and 925d477.

📒 Files selected for processing (2)

• docs/cli/monograph/check.mdx
• docs/cli/subgraph/check.mdx

🚧 Files skipped from review as they are similar to previous changes (2)

• docs/cli/subgraph/check.mdx
• docs/cli/monograph/check.mdx

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Walkthrough

Adds documentation for two new CLI options, -j/--json and -o/--out [string], to the monograph and subgraph check commands; includes usage examples, sample JSON output blocks, and minor formatting fixes (removal of an extra trailing blank line).

Changes

Cohort / File(s)	Summary
CLI check docs docs/cli/monograph/check.mdx, docs/cli/subgraph/check.mdx	Introduces -j, --json (print results as JSON) and -o, --out [string] (write JSON to a file) options; adds examples showing JSON output and file-writing workflows; adds sample JSON output blocks and small formatting adjustments (removed extra trailing blank line in monograph doc).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'chore(docs): document --json flag' accurately summarizes the primary change in the changeset, which adds documentation for the --json flag across multiple CLI check command pages.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[StarpTech]

We are pretty much consistent by supporting --json --out Could you extend these for check as well?

https://cosmo-docs.wundergraph.com/cli/namespace/list
https://cosmo-docs.wundergraph.com/cli/federated-graph/list

[comatory]

@StarpTech I added --out flag as well and it's documented too.

[StarpTech]

LGTM