feat: add brand assets and update README with asset details

[shenxianpeng]

Summary by CodeRabbit

• Documentation
  • Expanded the branding guide with a clearer overview of available brand assets, including logos, wordmarks, banners, avatars, and social preview images.
  • Added guidance on where different assets are intended to be used, plus notes for editing source artwork and required font setup.

[2bndy5]

FYI, I wrote img-gen to generate social media preview cards like the ones you have checked in here. I've been porting it from a python library (sphinx extension) into rust... You can see how it works in the sphinx-social-cards docs. The idea is you feed it a YAML (or JSON) file, and it generates an image.

The only thing img-gen can't do is draw squiggly lines like the ones you have in the images pushed here. Well, it might if you tell it to draw a series of alternating arcs with a yellow border and no fill color

[shenxianpeng]

it looks intresting. I used https://claude.ai/design to genreate the assets in this PR

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

Walkthrough

The README now documents the cpp-linter brand asset library, including sourced artwork and color palette, social preview filenames, org-level asset files, source artwork categories, and editing notes for GIMP and Abril Fatface.

Changes

Branding README

Layer / File(s)	Summary
Brand asset documentation branding/README.md	Adds brand origin and palette details, social preview image references, org-level asset listings, source artwork categories, and GIMP/font editing notes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 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 accurately summarizes the main change: adding brand assets and updating the README with asset details.
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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