Import december-2020-12-18 from private repo (scrubbed 2026-05-27)

Targets Rec Room 2020.12.18 client.

Re-import after adding:
- DorkNet.ClientMod/dorknet-clientmod.json.template — config schema
  the launcher's manifest-driven patcher renders into UserData/.
- tools/build-patcher-zip.ps1 — produces the dorknet-clientpatch-{key}.zip
  Release asset the launcher fetches.
- .github/workflows/release.yml — auto-publishes both Release assets
  on v1-december-* tag push.

Scrubbed via maintainer-side scrub-for-public.ps1: same drop rules as
the prior import, plus build-patcher-zip.ps1 added to the tools/
allow-list so it survives the scrub.

DorkNet.ClientMod/dorknet-clientmod.json.template

@@ -0,0 +1,8 @@
+{
+  "ServerHost": "{HOST}",
+  "PhotonAppId": "{PHOTON_APPID}",
+  "PhotonVoiceAppId": "{PHOTON_VOICE_APPID}",
+  "PhotonCloudRegion": "{PHOTON_REGION}",
+  "InjectAuthValues": true,
+  "EnableTlsTrustBypass": true
+}