docs: improve badges

[realguse]

Originally in #2674

What is the purpose of this pull request?

• Documentation update

Description

This PR aims to update the badges to a more modern style (flat-square and for-the-badge).

Before Submitting

• I've read the Contribution Guidelines.
• I've checked if there was an existing PR that solves the same issue.

[realguse]

@jguddas, based on you contrast "issue", i have not found any solution. There doesn't seem to be a option to change the foreground/textcolor, sorry

[jguddas]

I did some testing, the dynamic color switch logic seams to only trigger when using hex values like by for example adding &color=febcda to the end of the url, weird.

Maybe worth doing A bug report for this, needs more testing tho, can't right now, I'm only on the phone.

What I suggest we do is find the hex value of the current color and try if adding it to the url helps.

[realguse]

Yeah, look likes that's the problem. I'll only add the color param to the ones that actually switches color automatically to keep things simple

[realguse]

After testing the color param on the badges, none of them changed their foreground color. So that means the contrast is sufficient enough according to shields.io

[jguddas]

Suggested change

	<a href="https://github.com/lucide-icons/lucide/blob/main/LICENSE"><img src="https://img.shields.io/npm/l/lucide?style=for-the-badge" alt="license"></a>
	<a href="https://github.com/lucide-icons/lucide/blob/main/LICENSE"><img src="https://img.shields.io/npm/l/lucide?style=for-the-badge&color=008c14" alt="license"></a>

I like @JoshuaKGoldberg s suggestion of changing the background colors to be a bit darker.
badges/shields#5497

What do you think?

[realguse]

Yeah, that feels more right. I'll do it now

[realguse]

I feel like #008c14 gets too dark, another option is to use brightgreen which looks like this:

[jguddas]

Minimum contrast to get me to be happy is 4.5.

We can try other shades and colors tho.

[realguse]

#1A871B

[realguse]

Possible colors:

[jguddas]

We could also make all the badges the lucide brand color, still pretty low tho.

[realguse]

Or should we even care about the contrast, there's a bunch of repos (and I mean a bunch) using brightgreen and white (fg) in their badges

[jguddas]

If it's not necessary to be readable, it's not necessary and should be removed entirely, I'm pretty strongly opinionated on this one :)

[realguse]

Found some colors with high enough (very close at least) contrast ratio. I'm not updating the other ones until we've found the final colors