Add Flatpak

[danielscoffee]

[https://github.com/DevDaaniel/awesome]

[This list adding flatpak]

By submitting this pull request I confirm I've read and complied with the below requirements 🖖

Please read it multiple times. I spent a lot of time on these guidelines and most people miss a lot.

Requirements for your pull request

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• You have to review at least 2 other open pull requests.
  Try to prioritize unreviewed PRs, but you can also add more comments to reviewed PRs. Go through the below list when reviewing. This requirement is meant to help make the Awesome project self-sustaining. Comment here which PRs you reviewed. You're expected to put a good effort into this and to be thorough. Look at previous PR reviews for inspiration. Just commenting “looks good” or simply marking the pull request as approved does not count! You have to actually point out mistakes or improvement suggestions. Comments pointing out lint violation are allowed, but does not count as a review.
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• This pull request has a title in the format Add Name of List. It should not contain the word Awesome.
  • ✅ Add Swift
  • ✅ Add Software Architecture
  • ❌ Update readme.md
  • ❌ Add Awesome Swift
  • ❌ Add swift
  • ❌ add Swift
  • ❌ Adding Swift
  • ❌ Added Swift
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  • ✅ - [iOS](…) - Mobile operating system for Apple phones and tablets.
  • ✅ - [Framer](…) - Prototyping interactive UI designs.
  • ❌ - [iOS](…) - Resources and tools for iOS development.
  • ❌ - [Framer](…)
  • ❌ - [Framer](…) - prototyping interactive UI designs
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• The suggested Awesome list complies with the below requirements.

Requirements for your Awesome list

• Has been around for at least 30 days.
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• Includes a succinct description of the project/theme at the top of the readme. (Example)
  • ✅ Mobile operating system for Apple phones and tablets.
  • ✅ Prototyping interactive UI designs.
  • ❌ Resources and tools for iOS development.
  • ❌ Awesome Framer packages and tools.
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  If you have not put in considerable effort into your list, your pull request will be immediately closed.
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  • ✅ awesome-web-typography
  • ❌ awesome-Swift
  • ❌ AwesomeWebTypography
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• All non-important but necessary content (like extra copyright notices, hyperlinks to sources, pointers to expansive content, etc) should be grouped in a Footnotes section at the bottom of the readme. The section should not be present in the Table of Contents.
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    Example: - [AVA](…) - JavaScript test runner.
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  You can still use a CI for linting, but the badge has no value in the readme.
• Does not include an Inspired by awesome-foo or Inspired by the Awesome project kinda link at the top of the readme. The Awesome badge is enough.

Go to the top and read it again.

[sindresorhus]

That's not an Awesome list.