feat: allow to Import showdown from GET parameters

[arleypadua]

PR Description: Import showdown directly from the URL

Overview

Recently I started writing a web-based version of a save editing app (PKHeX Web). This change allows importing Pokemon data directly from PKHeX Web (or any other app) using a base64-encoded URL parameter named import

Changes Made

- Decodes a base64-encoded string from the `import` URL parameter.
- Sets the decoded string as the value of the text area for importing Pokemon data.

Purpose

Facilitates seamless integration between any external app and the Pokemon calculator. Allows users to transfer Pokemon data (party or box) from PKHeX Web to the calculator, streamlining their workflow.

Example

The following URL:

https://calc.pokemonshowdown.com/index.html?import=VG90b2RpbGUgKE0pCklWczogMjIgSFAgLyAyMiBBdGsgLyAyMiBEZWYgLyA4IFNwQSAvIDI4IFNwRCAvIDIgU3BlCkVWczogOSBIUCAvIDEgU3BEIC8gNiBTcGUKQWJpbGl0eTogVG9ycmVudApMZXZlbDogMTAKTWlsZCBOYXR1cmUKLSBTY3JhdGNoCi0gTGVlcgotIFdhdGVyIEd1bgotIFJhZ2UKCkhvb3Rob290IChNKQpJVnM6IDIzIEhQIC8gMTUgQXRrIC8gOCBEZWYgLyAyOSBTcEEgLyAxNCBTcEQgLyA2IFNwZQpBYmlsaXR5OiBLZWVuIEV5ZQpMZXZlbDogMwpOYXVnaHR5IE5hdHVyZQotIFRhY2tsZQotIEdyb3dsCi0gRm9yZXNpZ2h0

Would render

[AustinXII]

Thanks! Would you be able to fix the tests?

[arleypadua]

Thanks! Would you be able to fix the tests?

Thanks, I guess lint was complaining about the use of let as a unknown token.

Switched to use the plain old var, hope it fixes the issue

[thejetou]

Hello, there are still some build errors, but these should be easy to fix. You can run tests locally btw (npm run test).

This should be ready-to-merge once the build errors are fixed.

[arleypadua]

Hello, there are still some build errors, but these should be easy to fix. You can run tests locally btw (npm run test).

This should be ready-to-merge once the build errors are fixed.

Whops, my bad.. as I'm on holidays, I thought that that was the only issue and ended up fixing on my phone.

Will find some time later this week to properly run it locally and fix everything ✌🏼

[arleypadua]

Thanks again @AustinXII @thejetou

Fixed all lint issues on the latest commit and tests are running green ✅

[thejetou]

For what it's worth, the commit you pushed did not include the linter fixes but I decided to just fix it myself instead.

Thanks.

[arleypadua]

Thanks a lot, don't know what happened since it fixed and passed locally.

Maybe I overlooked something. Thanks anyway