feat: buy_link field for non vendor-specific shop links for plugin pu…

[peat85]

…rchase

Related: #476

Intended for custom plugin buy links that are not vendor-specific.

Hint: Does not work if settings.multi_purchase is set to true (since this seems to require a gumroad link). See:

www.kimai.org/_layouts/store-item.html

Line 214 in 9514559

<a class="btn btn-success btn-lg w-100 btn-buy" href="{{ settings.gumroad }}" target="_blank"><i class="{{ buyBtnIcon }} me-2"></i> {{ buyTitle }}</a>

).

[peat85]

(was accidentally closed by me)

Refactored for updated files in kimai:main

[kevinpapst]

Thanks 👍

I used the moment to rewrite the shop pages and remove some older stuff.
There is now a generic "shop: https://yourshop..." setting available, which you should use.