Add DesignKit package

[pixlwave]

Adds a Swift package containing the start of the DesignKit project. This references dynamic colours that are generated from an Amazon Style dictionary in https://github.com/vector-im/element-design-tokens along with fonts that are copied from Element iOS. One day the fonts should hopefully be generated by the style dictionary, at which point DesignKit can become a components only package.

Another PR will follow this one that adds the package ready for use in the project.

[github-actions]

	Warnings
⚠️	This pull request seems relatively large. Please consider splitting it into multiple smaller ones.
⚠️	Please add a changelog.

Generated by 🚫 Danger Swift against 02f9a54

[codecov-commenter]

Codecov Report

Merging #57 (bdad31c) into develop (b4d9c72) will not change coverage.
The diff coverage is n/a.

❗ Current head bdad31c differs from pull request most recent head 02f9a54. Consider uploading reports for the commit 02f9a54 to get more accurate results

@@           Coverage Diff           @@
##           develop     #57   +/-   ##
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  Coverage     8.25%   8.25%           
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  Files           96      96           
  Lines         7833    7833           
  Branches      4174    4174           
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  Hits           647     647           
  Misses        7176    7176           
  Partials        10      10           

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[github-actions]

Changes in 57 (2022-05-26)

✨ Features

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[stefanceriu]

Apart from previews not working in the package itself (which we talked about and decided to ignore for now) this looks amazing! I can't wait to start using it. 👏

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication