Reduce sizes of ten icons

[Eiim]

• Messenger 824 -> 699 bytes
• Open Source 261 -> 243 bytes
• Typescript 1014 -> 623 bytes
• Laravel 523 -> 404 bytes
• Jellyfin 1003 -> 676 bytes
• Gojek 376 -> 299 bytes
• SOGo 1021 -> 851 bytes
• Codeberg 837 -> 597 bytes
• Udemy 537 -> 306 bytes
• StumbleUpon 598 -> 364 bytes

Total bytes saved: 1,934

Also fixes #547 and makes #548 redundant (has further optimizations than in #548)

I made a quick tool to help with some of these by changing the start node, which is fairly difficult to do with other tools like https://yqnn.github.io/svg-path-editor/ or Inkscape. It's still slightly buggy, but it mostly works: https://eiim.github.io/SVGPathStartMover/

If I do more groups of these optimizations in the future, let me know if I should do it differently in any way, like if you want them all as separate PRs, or if I should only change the README once at the end, or some such.

[edent]

Amazing! Keep doing what you're doing :-)

I'm granting you commit access to the Repo. This is per the advice of The Pull Request Hack.

Please use this privilege wisely.

[Eiim]

Many thanks! I'll certainly be sure to use the privilege with care.