Add TorStrings module for localization

browser/base/content/browser.xhtml

browser/installer/package-manifest.in

mobile/android/installer/package-manifest.in

toolkit/modules/TorStrings.sys.mjs

toolkit/modules/moz.build

toolkit/moz.build

toolkit/torbutton/chrome/locale/en-US/aboutTBUpdate.dtd

toolkit/torbutton/chrome/locale/en-US/brand.properties

toolkit/torbutton/chrome/locale/en-US/branding/brand.ftl

...it/torbutton/chrome/locale/en-US/onionLocation.properties

toolkit/torbutton/chrome/locale/en-US/settings.properties

toolkit/torbutton/chrome/locale/en-US/torConnect.properties

toolkit/torbutton/chrome/locale/en-US/torbutton.dtd

toolkit/torbutton/chrome/locale/en-US/torbutton.properties

toolkit/torbutton/chrome/locale/en-US/torlauncher.properties

toolkit/torbutton/jar.mn

toolkit/torbutton/moz.build