Link matching workspace packages in pnpm

Enable workspace linking for semver-compatible local packages so
pnpm install resolves the in-repo @fedify/botkit package instead of
failing against the registry for the unreleased 0.4.0 range.

Refresh pnpm-lock.yaml after the workspace resolution change.

Co-Authored-By: OpenAI Codex <codex@openai.com>

Author: dahlia

pnpm-lock.yaml

@@ -2,6 +2,8 @@ packages:
 - packages/*
 - docs
 
+linkWorkspacePackages: true
+
 catalog:
   "@fedify/denokv": 2.1.2
   "@fedify/fedify": 2.1.2