Changelog overlay

[HoutarouOreki]

Mostly resolves #2886

Ready for reviews.

• Header
• Update Stream badges
• Chart (API works)
• Changelog
• Per-update stream changelog

• Use no-break-space for $" by {entry.GithubUser.DisplayName}" not working
• Match web sizing

ppy takeover

• Depends on Add graphical resources for changelog overlay osu-resources#56.
• Depends on Move TooltipText to OsuClickableContainer #4830.
• Depends on Use OsuColour for profile overlay #4831.
• Depends on Abstract profile header #4832.
• Depends on Only play OsuHoverContainer hover effect if action is present #4833.
• Depends on Allow custom icon specification in ScreenTitle #4834.
• Depends on Fix usages of SpriteText (instead of OsuSpriteText) #4835.
• Depends on Update framework #4837.
• Depends on Add ExpandingBar UI element #4844.
• Depends on Allow null selections in tab controls osu-framework#2430.
• Depends on Add support for multiline tab controls osu-framework#2431.

---

[peppy]

Please learn to split out and name your commits better. They should describe what you are doing inside them.

[peppy]

@HoutarouOreki This is all done now. working your code into a good state probably took 2-3x what it would have been writing from scratch, but i hope looking through my commits (and the approach to how i went about fixing pieces) is helpful to you.

Make sure to check our all the pull requests and fixes which spawned from this implementation (added to the original description of this PR).

[smoogipoo]

@peppy do a visual pass on it once more and check my recent commits.