fastlane: slightly improve formatting for full descriptions

[IzzySoft]

This PR slightly improves formatting of the English full description, making it possible to render it as Markdown (supported e.g. at IzzyOnDroid) while keeping it compatible with places not supporting it (e.g. F-Droid.org, PlayStore).

[yurtpage]

Similar to the #193

[IzzySoft]

Indeed – didn't see that, apologies! Nor did I expect that not yet being merged – it's waiting for more than 3 months now.

@Yet-Zio if you merged Yurt's PR, mine can of course be closed unmerged. I just fixed the formatting, Yurt even improved content. Full HTML is supported by IzzyOnDroid as well.

[IzzySoft]

@Yet-Zio is there any chance one of the two PRs getting merged? Would help us with our current repo overhaul at IzzyOnDroid as well 🙏

Oh, I see our badge is missing here. yetCalc is listed at https://apt.izzysoft.de/packages/yetzio.yetcalc since 2022-12-30 already. Be welcome to pick a badge and link there e.g. from your Readme!

[IzzySoft]

So any progress? At some point, we'll have to move on with our reorg; with this PR unmerged, the formatting improvements applied locally here will then be lost.

[IzzySoft]

We're now about to finalize our reorg – with the results of these improvements being lost then. Giving you some more motivation, these are the installs/updates in 2025 via IzzyOnDroid:

So about 1k per month, or 30 per day. Should be worth it, right? 😉

[IzzySoft]

Any chance to get this (or the other one) merged, @Yet-Zio – so we can move on with our current repo reorg at IzzyOnDroid? 🙏

[Yet-Zio]

Hi, @IzzySoft extremely sorry, I have been busy with work a lot and on a lot of bugs, other personal things. I have seen the mails. I will merge it into a separate branch for now, as I can see there are bugs / feature requests from some users as well.

[Yet-Zio]

I might release a new build either thursday or friday with some additional fixes if possible which will include your commit as well.

[IzzySoft]

Thanks a lot, @Yet-Zio 🤗 Please give me a ping once this arrives in the "default branch", so we can properly establish it here (doing it with a specific release branch would be no good, as it would then be "frozen in time").