feat:@angular/cli add support for tsx syntax

[wholysz]

Add support for tsx syntax in component files
Closes #8046

[wholysz]

Hello, I tried to reflect needed changes in all files that were relevant, although I'm not sure if I covered all of the edge cases. Especially in packages/@ngtools/webpack/src/lazy_routes.ts#53.

In my opinion we don't need to ensure that the module will be resolved into .tsx, as angular modules are always written in "plain" .ts. If you could, please double check that I'm not wrong 😄

[filipesilva]

Heya, some tests still seem to be failing. It looks like it's the path resolver.

[filipesilva]

@hansl could you have a look?

[trotyl]

I guess this is depending on angular/angular#20556, currently Angular compiler/compiler-cli itself is incompatible with .tsx file suffix.

[wholysz]

@trotyl Thanks! Perhaps you're right. Any ETA for your PR merge? Would love to have it in place :)

@hansl do you find something missing in above changes? The build is failing due to the tests. Can we sync up on gitter regarding this?

[rsxdalv]

@wholysz @trotyl The upstream PR has been merged

[hansl]

Although we should support TSX files, this PR really needs to be updated and cleaned up. Closing this but if you submit a new PR we'll take a look at it. Thanks

[rsxdalv]

For anyone stumbling upon this, here's the current workaround: https://gist.github.com/majo44/4862b8e7db6254975669e0a3f9d67a2a
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