luci-app-ledtrig-rssi: add i18n file of Spanish translation

Add a .po file to enable language translation for this app in Weblate.

Signed-off-by: Franco Castillo <castillofrancodamian@gmail.com>

applications/luci-app-ledtrig-rssi/po/es/ledtrig-rssi.po

@@ -0,0 +1,36 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: \n"
+"POT-Creation-Date: \n"
+"PO-Revision-Date: \n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"Language: es\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Generator: Poedit 3.8\n"
+
+#: applications/luci-app-ledtrig-rssi/htdocs/luci-static/resources/view/system/led-trigger/rssi.js:12
+msgid "Device"
+msgstr ""
+
+#: applications/luci-app-ledtrig-rssi/htdocs/luci-static/resources/view/system/led-trigger/rssi.js:24
+msgid "Maximal quality"
+msgstr ""
+
+#: applications/luci-app-ledtrig-rssi/htdocs/luci-static/resources/view/system/led-trigger/rssi.js:19
+msgid "Minimal quality"
+msgstr ""
+
+#: applications/luci-app-ledtrig-rssi/htdocs/luci-static/resources/view/system/led-trigger/rssi.js:34
+msgid "Multiplication factor"
+msgstr ""
+
+#: applications/luci-app-ledtrig-rssi/htdocs/luci-static/resources/view/system/led-trigger/rssi.js:29
+msgid "Value offset"
+msgstr ""
+
+#: applications/luci-app-ledtrig-rssi/htdocs/luci-static/resources/view/system/led-trigger/rssi.js:7
+msgid "WiFi signal quality (service: rssileds)"
+msgstr ""