feat: how to setup UGS In-Editor Tutorial added [MTT-8923]

[fernando-cortez]

Description

This PR adds an In-Editor Tutorial which walks through the process of associating your Unity project with a Unity Cloud ID.

Issue Number(s)

MTT-8923

Contribution checklist

• [ N/A ] Tests have been added for boss room and/or utilities pack
• Release notes have been added to the project changelog file and/or package changelog file
• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• JIRA ticket ID is in the PR title or at least one commit message
• Include the ticket ID number within the body message of the PR to create a hyperlink
• [ N/A ] An Index entry has been added in readme.md if applicable

[RikuTheFuffs]

2nd page

I'm going through the tutorial and the 2nd page has several issues:

1. The instructive text [steps 1 to 4] is in the narrative paragraph, while the instructive paragraph has "Press next to continue" as the only instruction, which you can't even perform as the Next button is (correctly) turned off. Moreover, since the page (correctly) autoadvances, that instruction is useless as you can not perform it.
2. The instructive text is mostly redundant as Project Settings window already guides the user
3. Steps 3 is incorrect and unnecessary: you don't have to expand the Services tab, you just have to select on it.

For reference, this is how the exact same tutorial page looks like in the Small Scale template:

Last page

1. "you are ready to connect online" doesn't make much sense. Maybe "you are ready to use Unity Gaming Services" would be more in line with the tutorial
2. The instructive text has a status update ("Project linked successfully"), which is already written in the narrative text + doesn't align with IET guidelines. Instructive text should be step-by-step instructions.
3. "Select Done to exit this tutorial" -> "Press Done to complete this tutorial"