chore: move common deps to catalog

[comatory]

Put common dependencies to pnpm catalog.

How to test

Pull the branch, run pnpm install in the root, then build the affected packages:

pnpm --filter './admission-server' --filter './cdn-server' --filter './playground' --filter './studio' build

Summary by CodeRabbit

• Chores
  • Switched several shared dependencies to use the workspace version catalog for more consistent installs.
  • Added catalog entries for the updated dependency versions used across the app.
  • No user-facing functionality changes.

Checklist

• I have discussed my proposed changes in an issue and have received approval to proceed.
• I have followed the coding standards of the project.
• Tests or benchmarks have been added or updated. (n/a)
• If applicable, I have provided instructions for reviewers for manually validating my changes.
• Documentation has been updated on https://github.com/wundergraph/docs-website. (n/a)
• I have read the Contributors Guide.

Open Source AI Manifesto

This project follows the principles of the Open Source AI Manifesto. Please ensure your contribution aligns with its principles.

[coderabbitai]

Walkthrough

This PR adds postcss and @hono/node-server to the pnpm workspace catalog, then updates the affected package manifests to resolve those dependencies through catalog: references.

Changes

Catalog-based dependency resolution

Layer / File(s)	Summary
Workspace catalog entries pnpm-workspace.yaml	Adds postcss and @hono/node-server versions to the workspace catalog.
Package manifests switched to catalog resolution admission-server/package.json, cdn-server/package.json, playground/package.json, studio/package.json	Replaces pinned postcss and @hono/node-server version specs with catalog: references in the affected package manifests.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• wundergraph/cosmo#2782: Switches the same @hono/node-server dependency from a pinned version to catalog: resolution in this monorepo.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: moving shared dependencies to the pnpm catalog.
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

---

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.63%. Comparing base (341f51a) to head (a00f6ac).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3014      +/-   ##
==========================================
+ Coverage   46.51%   47.63%   +1.11%     
==========================================
  Files        1120     1140      +20     
  Lines      154916   159412    +4496     
  Branches    10055    11054     +999     
==========================================
+ Hits        72059    75933    +3874     
- Misses      81023    81624     +601     
- Partials     1834     1855      +21     

see 24 files with indirect coverage changes

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[github-actions]

Router-nonroot image scan passed

✅ No security vulnerabilities found in image:

ghcr.io/wundergraph/cosmo/router:sha-09d9d39ebb2ab9b49ac4e02b2c79e2ad7cfe07cd-nonroot