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

logos/alternate/README.md

@@ -0,0 +1,15 @@
+# Alternate Logo (KIT)
+
+The abbreviated **KIT** mark using the same stylized "K" followed by block "IT" letters.
+
+## Files
+
+| File               | Description                         |
+|--------------------|-------------------------------------|
+| `kit-alt-blue.png` | Cobalt blue KIT on transparent      |
+
+## Usage
+
+- Use when the full wordmark is too wide for the available space.
+- Good for hats, small signage, and compact layouts where the brand is already established in context.
+- Minimum width: 80px digital, 0.75" print.