feat(deno): migrate sustainabot/bot-integration npm → Deno (standards#253)

Class A (pure-Deno port). Deletes redundant package.json stub
(private:true, no deps, scripts just mirror deno.json's affinescript
compile/watch/clean tasks). deno.json is fully self-contained with
full imports map.

Refs: standards#253 STEP 3 (smallest-first batch).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.gitignore

@@ -137,3 +137,11 @@ deps/
 .cache/
 build/
 dist/
+
+# npm-avoidant (standards#67)
+package-lock.json
+**/package-lock.json
+bun.lockb
+yarn.lock
+pnpm-lock.yaml
+.npmrc