* build_bazel_rules_typescript renamed to npm_bazel_typescript
* build_bazel_rules_karma renamed to npm_bazel_karma
* browser_repositories.bzl removed and now using @npm_bazel_karma//:browser_repositories.bzl
* includes some fixes for future ts_library devmode es2015 support but some failure still remain when devmode is es2015 so this PR keeps it as es5 using the bazelOptions.devmodeTargetOverride tsconfig setting
PR Close#28896
This helps ensure we use the same tsconfig.json file for all compilations.
Next steps are to make it the same tsconfig.json file used by the editor
PR Close#20964
Add enough BUILD files to make it possible to
`bazel build packages/core/test`
Also re-format BUILD.bazel files with Buildifier.
Add a CI lint check that they stay formatted.
PR Close#20768
Greg Magolan