Add TorStrings module for localization

browser/base/content/browser-doctype.inc

browser/base/content/browser.xhtml

browser/base/content/hiddenWindowMac.xhtml

browser/base/content/pageinfo/pageInfo.xhtml

browser/components/places/content/places.xhtml

browser/components/shell/content/setDesktopBackground.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/aboutDialog.dtd

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

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

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

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

...orbutton/chrome/locale/en-US/browserOnboarding.properties

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

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

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