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.

public/index.html

@@ -11,25 +11,13 @@
   <link href="/static/img/logo.png" rel="shortcut icon" type="image/png">
   <link href="/static/img/logo.png" rel="shortcut icon" sizes="192x192">
   <link href="/static/img/logo.png" rel="apple-touch-icon">
-  <meta content="Logseq" name="apple-mobile-web-app-title">
+  <meta content="Synapse" name="apple-mobile-web-app-title">
   <meta content="yes" name="apple-mobile-web-app-capable">
   <meta content="yes" name="apple-touch-fullscreen">
   <meta content="black-translucent" name="apple-mobile-web-app-status-bar-style">
   <meta content="yes" name="mobile-web-app-capable">
-  <meta content="summary" name="twitter:card">
-  <meta content="A privacy-first, open-source platform for knowledge management and collaboration." name="twitter:description">
-  <meta content="@logseq" name="twitter:site">
-  <meta content="A privacy-first, open-source platform for knowledge management and collaboration." name="twitter:title">
-  <meta content="https://asset.logseq.com/static/img/logo.png" name="twitter:image:src">
-  <meta content="A privacy-first, open-source platform for knowledge management and collaboration." name="twitter:image:alt">
-  <meta content="A privacy-first, open-source platform for knowledge management and collaboration." property="og:title">
-  <meta content="site" property="og:type">
-  <meta content="https://logseq.com" property="og:url">
-  <meta content="https://asset.logseq.com/static/img/logo.png" property="og:image">
-  <meta content="A privacy-first, open-source platform for knowledge management and collaboration." property="og:description">
-  <title>Logseq: "A privacy-first platform for knowledge management and collaboration."</title>
-  <meta content="logseq" property="og:site_name">
-  <meta content="A privacy-first, open-source platform for knowledge management and collaboration." name="description">
+  <title>Synapse: A privacy-first, personal knowledge management platform</title>
+  <meta content="A privacy-first, personal knowledge management platform." name="description">
 </head>
 <body>
 <div id="root"></div>