Add a GitHub Action to close issues with outdated versions

[RyanLua]

Creates a GitHub Action workflow that runs every time a bug report issue is created to check the Bloxstrap version in the Bloxstrap version field and whether it is the latest version.

If ### Bloxstrap Version exists in the issue body and it cannot detect the version, it will comment the below (and not close the issue):

Please specify the Bloxstrap version you are using. Use the format vX.Y.Z.

If it properly detects the Bloxstrap version and it is outdated, it will comment the below and close the issue as not planned:

You are using an outdated version of Bloxstrap (v1.2.3). Please update to the latest version of Bloxstrap. If you are still experiencing the bug, please reopen this issue.

The workflow derives the latest Bloxstrap version from the <Version> key in the Bloxstrap/Bloxstrap.csproj file.

Closes #3513

[RyanLua]

Feel free to test out how it works by creating an issue in https://github.com/RyanLua/bloxstrap/issues where it is live and where the PR is merging from.

@pizzaboxer mentioned about extending my initial feature request issue (#3513 (comment)) for auto respond to keywords but this PR is not for that.

[pizzaboxer]

I was considering writing my own action application to handle this, I didn't think about (or even know that you could use) action scripting. This is really nice, thanks. I will definitely need to make adjustments to this though.

[RyanLua]

I was considering writing my own action application to handle this, I didn't think about (or even know that you could use) action scripting. This is really nice, thanks. I will definitely need to make adjustments to this though.

Yeah, definitely let me know what changes you need or just directly edit this PR. I guessed some generic comments responses.

As mentioned previously, you can update the PR to add in a auto responder to key words since the code is fairly easy to edit to add that functionality.