templatize mimeapps default browser per host

Use default-browser.desktop for text/html on UGC* work machines and
firefox.desktop everywhere else.

dot_config/mimeapps.list.tmpl

@@ -1,3 +1,5 @@
+{{ $browser := "firefox.desktop" -}}
+{{ if hasPrefix "UGC" .chezmoi.hostname }}{{ $browser = "default-browser.desktop" }}{{ end -}}
 [Added Associations]
 application/json=nvim.desktop;
 application/pdf=firefox.desktop;libreoffice-draw.desktop;chromium-browser.desktop;org.inkscape.Inkscape.desktop;krita_pdf.desktop;display-im7.q16.desktop;
@@ -15,7 +17,7 @@ application/pdf=firefox.desktop;
 application/x-docbook+xml=nvim.desktop;
 application/x-yaml=nvim.desktop;
 text/csv=libreoffice-calc.desktop;
-text/html=default-browser.desktop
+text/html={{ $browser }}
 text/markdown=nvim.desktop;
 text/plain=wine-Programs-Kvaser Database Editor 3-Kvaser Database Editor 3.desktop;
 text/x-cmake=nvim.desktop;