Add structured directory to the d/acc Market Map page

Problem

The d/acc Market Map page includes an excellent infographic mapping 80+ projects across the defensive acceleration ecosystem. However, the infographic is a static PNG — none of the projects are linked, named in structured form, or navigable from the page itself.

A visitor who discovers a project logo they're interested in currently has to:

1. Identify the logo visually
2. Guess or research the project name
3. Search externally for the project website
4. Hope they found the right entity

This creates unnecessary friction and multiple points of failure, especially for less well-known projects in verticals like Civic Tech, Biodefense, and Property Rights where logos aren't widely recognized.

Proposal

Append a d/acc Market Map Directory section to the existing page content — a compact, categorized list of every project on the map with its name linked to its primary website. Organized by the same verticals shown in the infographic (Biodefense & Health Systems, Resilient Manufacturing, Zero-Knowledge Systems, etc.).

The format is intentionally minimal: project names as inline links, grouped under category headings, using the · separator pattern. No descriptions or editorializing — the existing prose on the page already provides that context.

Why this matters

• The page's own framing states the map's goal is to make the d/acc ecosystem "legible." A static image with no links works against that goal.
• The infographic's "Did we miss something? Let us know" prompt signals the map is intended as a living resource — a structured directory supports that intent.
• The current governance proposal discussing d/acc-focused grants restructuring makes this directory more operationally relevant.

Implementation

Single markdown file edit to src/content/research/d-acc-market-map.md. New section appended after "Further Reading." No structural or styling changes to the existing page. PR incoming.