Add benchmarks testing overhead of drawable load process

Add a note warning against using spaces/hyphens when consuming templates

Let `TabControl` always sort initial selection if auto sort is on

Add better documentation and handling of update rate extremities

Improve headless test run efficiency

Fix video decode running before start time

Fix user storage potentially losing true existing install directory

Fix duplicated section in readme

Co-authored-by: Dan Balasescu <smoogipoo@smgi.me>

Add introduction to README for users looking to use the framework, not work on it

Fix video stopping playback permanent when reaching end of stream

Reduce video decode overhead after reaching end of stream

Bump ppy.osu.Framework from 2021.728.0 to 2021.830.0

This commit also adds safety against entering an unexpected decoder
state (at our end), and extracts the single frame decode method for
readability.

Fix `GetBackwardWordAmount()` going back two words if the last word is only one character long

Bump Markdig from 0.25.0 to 0.26.0

Bumps [ppy.osu.Framework](https://github.com/ppy/osu-framework) from 2021.728.0 to 2021.830.0.
- [Release notes](https://github.com/ppy/osu-framework/releases)
- [Commits](https://github.com/ppy/osu-framework/compare/2021.728.0...2021.830.0)

---
updated-dependencies:
- dependency-name: ppy.osu.Framework
dependency-type: direct:production
update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [Markdig](https://github.com/xoofx/markdig) from 0.25.0 to 0.26.0.
- [Release notes](https://github.com/xoofx/markdig/releases)
- [Changelog](https://github.com/xoofx/markdig/blob/master/changelog.md)
- [Commits](https://github.com/xoofx/markdig/compare/0.25.0...0.26.0)

---
updated-dependencies:
- dependency-name: Markdig
dependency-type: direct:production
update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump ppy.osu.Framework.iOS from 2021.728.0 to 2021.830.0

Bumps [ppy.osu.Framework.iOS](https://github.com/ppy/osu-framework) from 2021.728.0 to 2021.830.0.
- [Release notes](https://github.com/ppy/osu-framework/releases)
- [Commits](https://github.com/ppy/osu-framework/compare/2021.728.0...2021.830.0)

---
updated-dependencies:
- dependency-name: ppy.osu.Framework.iOS
dependency-type: direct:production
update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>