Add lit components localization
Localization is performed via the @lit/localize package, which has been
integrated into the repo. A I18nLitElement class which extends
LitElement has been included, which automatically sets up the
localization.
This CL also introduces localization to the flattenThreads feature.
Fixed: twpowertools:157
Change-Id: If01540b9c8d70876a648aa002a1e0a5bede8f383
diff --git a/src/lit-locales/generated/.gitignore b/src/lit-locales/generated/.gitignore
new file mode 100644
index 0000000..afe8be7
--- /dev/null
+++ b/src/lit-locales/generated/.gitignore
@@ -0,0 +1,2 @@
+*.js
+*.ts