Document that package.json aliases may target only direct subfolders of src (#21)

Follow-up to #20, which was merged before this landed.

bot-agents has no `package.json` `imports` aliases (`src/` is flat and everything imports relatively), so no code changes. This records the new rule in the docs:

- `.agents/memory/imports-aliases-barrels.md`: aliases may target only a direct subfolder of `src/` (its `index.ts` or a `#x/*` pattern); nothing outside `src/`, not `src/` itself, not deeper folders; such code imports relatively.
- `.agents/memory/tests-layout-vitest.md`: `tests/` reach the public entry through a relative import, not a `#plugin` alias.
- `.agents/skills/migrate-deno-repo/SKILL.md` and `AGENTS.md`: same rule.

`vp check`, `vp test`, and `damem doctor` pass.

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Reviewed-on: #21
Reviewed-by: bot <noreply@capsulizers.com>
Co-authored-by: Danny Kim <temeddix@gmail.com>
Co-committed-by: Danny Kim <temeddix@gmail.com>

package.json

@@ -1,10 +1,10 @@
 {
   "name": "bot-agents",
-  "description": "A Gitea composite action that runs a coding agent for approved issue and pull request automation.",
   "private": true,
+  "description": "A Gitea composite action that runs a coding agent for approved issue and pull request automation.",
   "type": "module",
-  "engines": {
-    "node": ">=24.2"
+  "imports": {
+    "#testing": "./src/testing/index.ts"
   },
   "devDependencies": {
     "@eslint/core": "^0.17.0",