[docs](trx-rs): track improvement areas in aidocs/wip.md

Record the three-tier improvement backlog (infrastructure, robustness,
product) with a per-item progress status column, so the work discovered
in the July 2026 repo scan is tracked. Register aidocs/** in REUSE.toml
alongside docs/**.

Assisted-By: Claude Code (claude-opus-4)
Claude-Session: https://claude.ai/code/session_01NFpGtGTWUEYXLwZeZs2RAV
Signed-off-by: Stan Grams <sjg@haxx.space>

REUSE.toml

@@ -11,6 +11,7 @@ path = [
     "README.md",
     "trx-rs.toml.example",
     "docs/**",
+    "aidocs/**",
     "src/decoders/trx-ftx/README.md",
     "src/decoders/trx-wxsat/README.md",
     "assets/trx-logo.png",