Add the DesignKit package to the project.

[pixlwave]

Following on from #57, this PR adds the package to the project and uses it in the login screen. I've added it locally using a path and Xcodegen puts it in a Packages group which is nice. Also adds:

• An ElementTextFieldStyle that uses the BorderedInputFieldStyle and adds a header, footer and focus state.
• Static access for all of the SwiftUI styles.

I've applied the styles to the login screen as part of this PR:

[github-actions]

	Warnings
⚠️	Some of the commits are missing ticket numbers. Please consinder using them for better tracking.

Generated by 🚫 Danger Swift against 6796f56

[github-actions]

Changes in 64 (2022-06-09)

✨ Features

• Implement rageshake service. (#23)
• Add filtering for rooms by name. (#26)
• DesignKit: Add initial implementation of DesignKit to the repo as a Swift package. (#43)

🙌 Improvements

• DesignKit: Add DesignKit to the ElementX project and style the login screen with it. (#43)

🐛 Bugfixes

• ElementInfoPlist: Use custom template for Info.plist. (#71)

🧱 Build

📱 Scan the QR code below to install the build for this PR.
🔒 This build is for internal testing purpose. Only devices listed in the ad-hoc provisioning profile can install Element Alpha.

If you can't scan the QR code you can install the build via this link: https://i.diawi.com/qXoH5G

[codecov-commenter]

Codecov Report

Merging #64 (6796f56) into develop (7a45837) will increase coverage by 1.68%.
The diff coverage is 33.68%.

@@             Coverage Diff             @@
##           develop      #64      +/-   ##
===========================================
+ Coverage    14.39%   16.07%   +1.68%     
===========================================
  Files          111      121      +10     
  Lines         8866     9293     +427     
  Branches      4556     4690     +134     
===========================================
+ Hits          1276     1494     +218     
- Misses        7558     7752     +194     
- Partials        32       47      +15     

Impacted Files	Coverage Δ
...nKit/Sources/Buttons/ElementGhostButtonStyle.swift	0.00% <0.00%> (ø)
DesignKit/Sources/Shapes/RoundedCornerShape.swift	0.00% <0.00%> (ø)
...ources/Screens/LoginScreen/LoginScreenModels.swift	0.00% <0.00%> (ø)
...Kit/Sources/TextFields/ElementTextFieldStyle.swift	37.28% <37.28%> (ø)
...t/Sources/TextFields/BorderedInputFieldStyle.swift	50.00% <50.00%> (ø)
...Kit/Sources/Buttons/ElementActionButtonStyle.swift	43.63% <62.50%> (ø)
...Sources/Screens/LoginScreen/View/LoginScreen.swift	65.85% <71.42%> (-6.57%)	⬇️
DesignKit/Sources/Fonts/ElementUIFonts.swift	0.00% <0.00%> (ø)
... and 5 more

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[ismailgulek]

Looks great! Just a couple of comments.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[ismailgulek]

LGTM!