docs(core/content-header): Add docs for content-header responsive behavior

[dmytro-halimov]

Main Repo PR: siemens/ix#2702

🆕 What is the new behavior?

• Document responsive title and subtitle wrapping in ix-content-header.
• Explain explicit truncation and consumer-managed action overflow.
• Add the truncation example to the component’s code page.

👨‍💻 Help & support

Summary by CodeRabbit

• Documentation
  • Documented the application’s built-in “Skip to main content” link, including configuration, validation, localization, fallback behavior, and disabling options.
  • Added accessibility guidance for skip links and updated navigable-aids recommendations.
  • Expanded content-header guidance for responsive text, wrapping, truncation, alignment, overflow, and action menus.
  • Added examples covering content-header text truncation behavior.

[netlify]

❌ Deploy Preview for industrial-experience failed.

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🔨 Latest commit	62b311e
🔍 Latest deploy log	https://app.netlify.com/projects/industrial-experience/deploys/6a75db51ef275d000877235e

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR documents Application skip-link behavior and accessibility guidance. It also documents responsive Content Header text handling, truncation, alignment, and overflow actions.

Changes

Application skip-link documentation

Layer / File(s)	Summary
Application skip-link behavior docs/components/application/code.mdx, docs/components/application/guide.md	The documentation describes the built-in skip link, target configuration, validation, fallback behavior, localization, disabling conditions, and accessibility references.
Accessibility guidance updates docs/guidelines/accessibility/code.md, docs/guidelines/accessibility/overview.md	The accessibility guidance references the Application component’s default skip link and target configuration.

Content Header text documentation

Layer / File(s)	Summary
Responsive text and truncation guidance docs/components/content-header/code.mdx, docs/components/content-header/guide.md	The documentation adds a truncation example and guidance for wrapping, truncation, tooltips, alignment, and overflow actions.

Estimated code review effort: 2 (Simple) | ~15 minutes

Possibly related PRs

• siemens/ix-docs#271: Documents the same ix-application skip-link behavior across related documentation files.

Suggested reviewers: flxlst09

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: documentation for content-header responsive behavior.
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.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/content-header-responsive-fix

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/components/application/code.mdx`:
- Line 23: Update the sentence near ApplicationPlayground to match the example
shown: either describe the configuration example that follows or add
skipLinkTargetId to the playground, ensuring the documentation does not claim
the preceding example uses configuration it does not show.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 8b13cd7c-dc3e-4a05-b718-783c3ba0a3d9

📥 Commits

Reviewing files that changed from the base of the PR and between 1f44ce1 and 442641f.

📒 Files selected for processing (6)

• docs/components/application/code.mdx
• docs/components/application/guide.md
• docs/components/content-header/code.mdx
• docs/components/content-header/guide.md
• docs/guidelines/accessibility/code.md
• docs/guidelines/accessibility/overview.md