add gen:ecosystem script to rebuild ecosystem.config.cjs from the database

bun gen:ecosystem writes the whole file from three sources: CORE_PROCESSES read
directly out of scripts/setup/officer-setup/lib/services.sh (shelled out to bash,
so there is exactly one list rather than a TS copy to keep in sync by hand),
marketplace plugins that are installed AND enabled in Postgres and actually ship a
sidecar/, and app-store services that are installed AND enabled, using each
catalogue entry's `process` name against the src/servers/sidecar/<id>/index.ts
convention.

Extracted `pluginPm2Entry` (a pure DiscoveredPlugin -> Pm2App) out of
addPluginToEcosystem so the live install/uninstall path and this from-scratch
rebuild share one definition of what a plugin's entry looks like, rather than two
that can drift apart. addPluginToEcosystem's own behavior is unchanged.

Complements, not replaces, the existing incremental add/remove in
servers/plugins/ecosystem.ts — that edits the live file at install time; this
regenerates the whole thing, for a fresh clone, drift, or restoring from a backup.

Found while testing against this machine's real file, worth flagging rather than
silently working around: officer-marketplace (the marketplace.officer.dev process,
src/servers/marketplace/server.tsx) is in this machine's ecosystem.config.cjs by
hand and is modeled by neither the plugin system nor the app-store catalogue, so
this script does not know about it and would drop its entry on a real run. Left
alone rather than guessed at.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

package.json

@@ -10,6 +10,7 @@
   "scripts": {
     "preinstall": "node -e \"var v = +process.versions.node.split('.')[0]; if (v < 22) { console.error('Node 22 or newer required (got ' + process.versions.node + '). Run: nvm use 22'); process.exit(1); }\"",
     "gen:index": "bun run ./scripts/gen-index.ts",
+    "gen:ecosystem": "bun run --env-file=.env ./scripts/gen-ecosystem.ts",
     "predev": "bun run ./scripts/gen-index.ts",
     "dev": "bun --env-file=.env --watch src/server.tsx",
     "prestart": "bun run ./scripts/gen-index.ts",