acg-website-showcase: add ACG master brand kit

Imported the canonical "Branding Stuff" archive (2026-06-15) into the website
project at projects/acg-website-showcase/brand-kit/: logos (transwhite/flatwhite/
vector EPS), full Lato font family (+ SIL OFL license), Guru Icons (16-512px),
brand Colors reference, social avatar, letterhead (2021/2025), business cards,
flat icon sheets, and stock images. 64 files. Added a README documenting contents
+ licensing (Lato = OFL; verify stock-image licenses before public reuse).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

projects/acg-website-showcase/brand-kit/README.md

@@ -0,0 +1,26 @@
+# ACG Brand Kit
+
+Canonical Arizona Computer Guru brand assets, imported from the master "Branding
+Stuff" archive on 2026-06-15 for use by the website project.
+
+## Contents
+- **Logos:** `logo-transwhite.png`, `logo-flatwhite.jpg`, `Old/Logo*.png`,
+  `Old/guru_vector.eps` (vector source)
+- **Guru Icons/** - favicon / app-icon sizes (16-512px)
+- **Lato Font/** - full Lato family (TTF) + `OFL.txt`
+- **Colors.png** - brand color reference
+- **social-avatar.jpg** - social profile avatar
+- **Letterhead 2021/**, `acg-letterhead-2025.png`, `Letterhead 2025.docx`
+- **Business Cards/** - current + historical card designs
+- **Icons/** - flat icon sheets
+- **stock images/** - stock photography
+- **Old/** - legacy / archived marks
+
+## Licensing
+- The Lato font family is licensed under the SIL Open Font License - see
+  `Lato Font/OFL.txt`.
+- Stock images: verify each image's license before any public/commercial reuse.
+
+## Note
+The showcase site itself currently uses JetBrains Mono (see `../DESIGN.md`); the
+Lato family here is ACG's corporate brand font for collateral (letterhead, cards, print).