docs: fix broken links

[kurekszymon]

• router-core: remove extra /router/ segment from notFound @link
• router-cli, router-plugin READMEs: point to /docs/installation/with-router-cli
• setup-basic-search-params: point removed zodValidator/valibotValidator API pages to the Zod/Valibot sections of the search-params guide
• solid getting-started: drop nonexistent start-bare example
• .gitignore: update GitHub ignore-files docs URL

🎯 Changes

when reading docs I noticed a broken link, asked local llm to check for more broken links and fixed those where I had high confidence of a proper fix. removed redundant ones

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested code changes locally with the relevant test commands, or tests do not apply to this pull request.
• I fully understand the code in this pull request, including any code generated with AI assistance.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

• Documentation
  • Updated links to GitHub’s current ignore-file documentation.
  • Corrected search-parameters guide links for TanStack Zod and Valibot adapters.
  • Updated Router CLI and plugin documentation links to the current installation page.
  • Updated the notFound API reference link.
  • Removed the Bare example from the Solid getting-started examples list.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository: TanStack/router/.coderabbit.yaml

Review profile: CHILL

Plan: Advanced

Run ID: 5e619a33-4dc3-4fd2-9e43-c2e09e15e2ae

📥 Commits

Reviewing files that changed from the base of the PR and between ac223be and e767cad.

📒 Files selected for processing (6)

• .gitignore
• docs/router/how-to/setup-basic-search-params.md
• docs/start/framework/solid/getting-started.md
• packages/router-cli/README.md
• packages/router-core/src/not-found.ts
• packages/router-plugin/README.md

💤 Files with no reviewable changes (1)

• docs/start/framework/solid/getting-started.md

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.

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📝 Walkthrough

Walkthrough

The pull request updates documentation URLs, changes two search-parameter references to local anchors, and removes the Solid Bare example from the getting-started list. No runtime behavior or public declarations change.

Changes

Documentation maintenance

Layer / File(s)	Summary
Documentation link corrections .gitignore, docs/router/how-to/setup-basic-search-params.md, packages/router-cli/README.md, packages/router-core/src/not-found.ts, packages/router-plugin/README.md	Updated external documentation URLs, changed search-parameter references to local guide anchors, and corrected the notFound API link.
Solid example list docs/start/framework/solid/getting-started.md	Removed the Bare (start-bare) example from the listed examples.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Suggested reviewers: sheraff

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (4 skipped: 4 …
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.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: fixing broken documentation links.
Description check	✅ Passed	The description lists the affected links and documentation updates, explains the motivation, completes the checklist, and correctly marks the change as docs-only with no release impact.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create a new PR

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