feat: load TSX files in importClassesFormDirectories

[11joselu]

Description

Right now you can not use TSX files to define routes.

We are using React with SSR (only some routes) but the .tsx are not loaded by importClassesFormDirectories because supporting files are: .ts & .js

Example:

import { Controller, Get, Render } from 'routing-controllers';
import { renderToString } from 'react-dom/server';
import React from 'react';

const Hello = () => <p>Hi!</p>

@Controller()
export class HomeController {
    constructor(private getBanners: GetBanners) {}

    @Get(`/`)
    @Render('home.njk')
    getHome(): void {
       // Render React Component
        const content = renderToString(<Hello />);
        
        return { metadata: { title: 'Home' }, content };
    }
}

That route will never appear (return 404)

Checklist

• the pull request title describes what this PR does (not a vague title like Update index.md)
• the pull request targets the default branch of the repository (develop)
• the code follows the established code style of the repository
  • npm run prettier:check passes
  • npm run lint:check passes
• tests are added for the changes I made (if any source code was modified)
• documentation added or updated
• I have run the project locally and verified that there are no errors

[NoNameProvided]

Thanks!

[github-actions]

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