feat(bundle): support for file qualifiers + builder refactor

[vakrilov]

PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
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• Tests for the changes are included - https://github.com/NativeScript/NativeScript/blob/master/WritingUnitTests.md.

What is in the PR

Both builder.ts and component-builder.ts refactored to work in webpack-only mode and to use only modules.
Implemented module-name-resolver that can resolve webpack (xml/js/css) that have file-qualifiers.

Fixes #7321
Fixes #7324
Related to NativeScript/nativescript-dev-webpack#902
Fixes #7392