Add README.md to every directory

Each subdirectory now has a README with:
- File inventory table
- Usage guidelines and specifications
- Technical details (viewbox, colors, sizes)
- Cross-references to related assets

svg/README.md

@@ -0,0 +1,13 @@
+# SVG (Vector Assets)
+
+Scalable vector versions of all Keylink IT marks. **Prefer these over PNGs** for any production use: print, vinyl cutting, embroidery digitizing, screen printing, and web.
+
+## Subdirectories
+
+| Directory     | Contents                                              |
+|---------------|-------------------------------------------------------|
+| `primary/`    | Full "Keylink IT" wordmark vectors (blue, white, black) |
+| `alternate/`  | (Reserved) KIT abbreviated logo vectors               |
+| `monomark/`   | (Reserved) Standalone K mark vectors                  |
+| `apparel/`    | Garment-optimized SVGs for shirts, jackets, hats      |
+| `taglines/`   | Tagline lockup vectors                                |