Prepare 1.21.50 support

[nicholass003]

Introduction

This PR updates PM5 to 1.21.50

Changes

Backwards compatibility

See pmmp/BedrockProtocol#279

[dktapps]

We don't accept gameplay changes in protocol update PRs. There's too much noise.

[dktapps]

(Please don't split conversations between Discord and GitHub. Most of the team don't actively read the public Discord and I don't see messages unless someone forwards them to me.)

Thanks for attempting to contribute. Your effort is appreciated, but there are some things you should be aware of.

First, PRs should do the minimum amount of changes needed to achieve a single objective. This has always been the way in PMMP. Doesn't matter what type of PR it is.

The number 1 rule of pull requests is: keep it small & simple. Don't do unnecessary changes in a PR & don't combine multiple changes. Large PRs & PRs containing multiple changes are exponentially more time-consuming to review. Maintainers don't have time to waste trying to review large PRs that don't follow contribution guidelines.

Second, protocol updates are a closely coordinated effort within the PMMP team between multiple people. It doesn't make sense to involve outside collaborators, as it will just slow down the update process. As seen in #6559 one of our team already had the code ready to go. We appreciate the effort you made, but as this is a process that requires team communication, it didn't make sense to consider this PR.

If you want to get more involved with changes like this, you should communicate with the team.

You're welcome to submit separate PRs to add new gameplay features using the code from this PR.

[nicholass003]

Thank you for the explanation, I understand, next I will discuss it with the team first before doing it.