Symlink CLAUDE.md → AGENTS.md to avoid drift

The existing AGENTS.md is a strict superset of CLAUDE.md — every
command, architecture note, and convention in CLAUDE.md is already
covered in AGENTS.md, usually in more detail (16 make targets vs
~5, full feature package list, 11 gotchas vs 6 generic conventions,
plus a Files Not to Modify section CLAUDE.md lacks).

Rather than maintain two files that will drift, symlink CLAUDE.md
to AGENTS.md. The agents.md standard explicitly documents this
migration pattern. AGENTS.md is natively supported by Claude Code,
Codex, Cursor, Copilot, Windsurf, and Gemini CLI — so making it the
source of truth expands tool coverage without losing anything, and
the symlink keeps any tooling still hardcoded to look for CLAUDE.md
working unchanged.

Same pattern applied on onflow/flow-ai-tools#33 per @peterargue's
review.

Author: Aliserag

CLAUDE.md

@@ -0,0 +1 @@
+AGENTS.md