Rename product to Synapse; add Gitea CI, VPS deploy templates, RPM build fixes

Rebrands user-facing product identity from Logseq to Synapse (package
metadata, Electron appId/protocol scheme, Android/iOS display names, HTML
titles, and the English UI dictionary), authored by Darío Sevilla
<dario@dariosevilla.es>. Internal Clojure namespaces, :logseq.class/*
and :logseq.property/* DB schema idents, and deps.edn's upstream git
dependency coordinates are intentionally left untouched -- those are
either persisted data in existing graphs or point at real upstream repos,
and renaming them has no user-visible benefit.

Also:
- .gitea/workflows/build.yml: Linux (AppImage/deb/rpm), Windows (nsis),
  and Android (debug APK) build jobs.
- deploy/: systemd unit + Caddyfile templates for a self-hosted VPS
  (daemon on loopback, Caddy reverse-proxies /v1/*, /mcp, /healthz and
  serves the static web client with TLS).
- gulpfile.js / prepare-desktop-runtime-js.mjs: LOGSEQ_SKIP_CLI_BUNDLE
  skips the cli/ OCaml package (no toolchain in this environment) instead
  of failing the build; LOGSEQ_ELECTRON_BUILDER_ARGS lets CI override the
  packaged Linux targets independently of the local default.
- resources/electron-builder.yml: drop the extraResources entry for a
  SKILL.md that doesn't exist in this fork, and the author.email fix
  needed for the rpm/deb targets' Packager/Maintainer metadata.

resources/electron-builder.yml

@@ -1,4 +1,4 @@
-appId: com.logseq.logseq
+appId: es.dariosevilla.synapse
 electronUpdaterCompatibility: ">=2.16"
 
 directories:
@@ -37,18 +37,11 @@ toolsets:
   appimage: "1.0.2"
 
 protocols:
-  - name: logseq
+  - name: synapse
     schemes:
-      - logseq
-
-publish:
-  - provider: github
-    owner: logseq
-    repo: logseq
+      - synapse
 
 extraResources:
-  - from: .agents/skills/logseq-cli/SKILL.md
-    to: .agents/skills/logseq-cli/SKILL.md
   - from: ../sidecar
     to: sidecar
 
@@ -83,7 +76,6 @@ linux:
   icon: icons/logseq.png
   category: Office
   target:
-    - AppImage
-    - zip
+    - rpm
   mimeTypes:
-    - x-scheme-handler/logseq
+    - x-scheme-handler/synapse