build: NSIS based Windows installer (#3240)

This commit adds support for creating Windows installers to ci.go

build/nsis.uninstall.nsh

@@ -0,0 +1,32 @@
+Section "Uninstall"
+  # uninstall for all users
+  setShellVarContext all
+
+  # Delete (optionally) installed files
+  {{range $}}Delete $INSTDIR\{{.}}
+  {{end}}
+  Delete $INSTDIR\uninstall.exe
+
+  # Delete install directory
+  rmDir $INSTDIR
+
+  # Delete start menu launcher
+  Delete "$SMPROGRAMS\${APPNAME}\${APPNAME}.lnk"
+  Delete "$SMPROGRAMS\${APPNAME}\Attach.lnk"
+  Delete "$SMPROGRAMS\${APPNAME}\Uninstall.lnk"
+  rmDir "$SMPROGRAMS\${APPNAME}"
+
+  # Firewall - remove rules if exists
+  SimpleFC::AdvRemoveRule "Geth incoming peers (TCP:30303)"
+  SimpleFC::AdvRemoveRule "Geth outgoing peers (TCP:30303)"
+  SimpleFC::AdvRemoveRule "Geth UDP discovery (UDP:30303)"
+
+  # Remove IPC endpoint (https://github.com/ethereum/EIPs/issues/147)
+  ${un.EnvVarUpdate} $0 "ETHEREUM_SOCKET" "R" "HKLM" "\\.\pipe\geth.ipc"
+
+  # Remove install directory from PATH
+  ${un.EnvVarUpdate} $0 "PATH" "R" "HKLM" $INSTDIR
+
+  # Cleanup registry (deletes all sub keys)
+  DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${GROUPNAME} ${APPNAME}"
+SectionEnd