feat: add ChirpStack Cloudron package (Infrastructure) [#668]

ChirpStack 4.19.1 (LoRaWAN network server) as the 14th package:
official-image wrapper, digest-pinned, with only bash added to the
upstream alpine runtime. Native OIDC login wired to the Cloudron
platform provider (openid_connect backend, config regenerated every
start); postgresql + redis addons; diesel migrations auto-run.
Operator config (NetID, US915 region, gateway MQTT backend) lives in
seeded files under /app/data/config. Build green; config generation
validated through chirpstack's own TOML parser. Docs gardened to 14
packages.

Ticket: https://projects.knownelement.com/issues/668

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Assisted-by: Crush:glm-5.2

Package-Workspace/Infrastructure/chirpstack/CloudronManifest.json

@@ -0,0 +1,25 @@
+{
+  "manifestVersion": 2,
+  "type": "app",
+  "id": "io.cloudron.chirpstack",
+  "title": "ChirpStack",
+  "description": "Open-source LoRaWAN network server: manage gateways, devices, tenants and integrations from a web interface. Users log in via OIDC (Cloudron single sign-on); PostgreSQL stores all state, Redis handles sessions and de-duplication. LoRaWAN gateways connect through an external MQTT broker configured per region.",
+  "author": "Orne Brocaar",
+  "website": "https://www.chirpstack.io/",
+  "contactEmail": "cloudron@tsys.dev",
+  "tagline": "LoRaWAN network server with web UI",
+  "version": "4.19.1",
+  "healthCheckPath": "/",
+  "httpPort": 8080,
+  "memoryLimit": 512,
+  "addons": {
+    "localstorage": true,
+    "postgresql": {
+      "version": "16"
+    },
+    "redis": {}
+  },
+  "mediaLinks": [],
+  "changelog": "Initial Cloudron package for ChirpStack 4.19.1 (official-image wrapper). Native OIDC login wired to the Cloudron platform identity provider (user_authentication.openid_connect from CLOUDRON_OIDC_* env); PostgreSQL addon for storage with auto-run diesel migrations; Redis addon for sessions and de-duplication. Config is split into a generated platform fragment (rewritten each start) and operator-owned files under /app/data/config (network NetID, regions, gateway MQTT backend) editable with the Cloudron file manager. US915 region seeded by default.",
+  "icon": "file://logo.png"
+}