Add Hacker Menu to Clients/Desktop

[jidicula]

Hacker Menu puts Hacker News in your menubar. Good for quick glances without getting sucked into an infinite scroll.

Thank you for your contribution to the awesome-hackernews repository. :thumbsup:
Before submitting this PR, please make sure the following conditions are met (please tick the relevant boxes):

• [x] The pull request concerns only one project¹.

• [x] This project is classified as FOSS.

• [x] The pull request title is "Add <xxx> to <yyy>", which means adding project <xxx> to section <yyy>.²

• [x] Your addition satisfy the following formatting³:

  - [Name](http://homepage/) - Short description. ([Source Code](http://url.of/source/code)) `License`

  If the project does not have a homepage, use the following format³:

  - [Name](http://url.of/source/code) - Short description. `License`

• [x] Your addition is inserted in alphabetical order in the list.

• [x] You have searched the repository for any relevant issues or PRs, including closed ones.

If you have any questions or would like to provide more information regarding your PR, please use the comments section below.

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¹: If you want to submit multiple projects, please open one PR per project.
²: If the project does not fit into an already existing section, i.e. a new one must be created, do not hesitate to create it. We'll discuss that in the comments below.
³: scripts/format_entry.sh can be invoked to help you.

[lebriton]

Hacker Menu has a homepage: hackermenu.io.

Let's use:

• https://hackermenu.io/as the main link
• https://github.com/owenthereal/hacker-menu as the source code link

[jidicula]

Hacker Menu has a homepage: hackermenu.io.

Let's use:

• https://hackermenu.io/as the main link
• https://github.com/owenthereal/hacker-menu as the source code link

Sure! I'll fix up my PR. I misunderstood the initial instructions 😅

[lebriton]

Cool! :+1: