feat: add helsinki-benefit amount estimate calculator

[sirtawast]

HL-360 / UHF-10588

What was done

• Implement a new calculator for https://www.hel.fi/fi/yritykset-ja-tyo/tyonantajat/taloudelliset-tuet/helsinki-lisa-tyonantajille
• Write tests for the new calculator

How to install

• npm install
• optionally, install test dependencies cd src/js/calculator/helsinki_benefit_amount_estimate/tests && npm install

How to test

To run manual tests

• npm run build
• start a local server on drupal-hdbt/, for instance python -m http.server 3001
• open http://localhost:3001/src/js/calculator/helsinki_benefit_amount_estimate/helsinki-benefit-test.html on your browser

To run automatic browser tests

This requires test dependencies to be installed

• cd src/js/calculator/helsinki_benefit_amount_estimate/tests && npm run test

Continuous documentation

• This feature has been documented/the documentation has been updated
• This change doesn't require updates to the documentation

https://helsinkisolutionoffice.atlassian.net/wiki/spaces/HEL/pages/8963751960/Helsinki-lis+n+m+r+n+laskuri

Translations

• Translations have been added to .js -files and included in this PR

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Screenshot 📸 🖼️

[teroelonen]

This is really nicely done and the tests were a good addition. We should definitely consider adding those ourselves! What I would still ask for you to do is to check my comments on the commented lines if they are still needed and to add the calculator machine name to templates/paragraphs/paragraph--calculator.html.twig file on line 32. Also this needs to have the minified js added and committed under the dist folder so please add that as well and we can merge this one 🙏

[sirtawast]

This is really nicely done and the tests were a good addition. We should definitely consider adding those ourselves! What I would still ask for you to do is to check my comments on the commented lines if they are still needed and to add the calculator machine name to templates/paragraphs/paragraph--calculator.html.twig file on line 32. Also this needs to have the minified js added and committed under the dist folder so please add that as well and we can merge this one 🙏

Job's done 👍

[teroelonen]

This is very good now 🦖