Details Block: Enable by default on Gutenberg plugin without opt-in

[t-hamano]

The Details block added in #45055 is experimental and cannot be used unless explicitly enabled from the Experimental settings menu.:

However, the other blocks (Time To Read, Table of Contents) with __experimental:true in block.json are enabled by default on the Gutenberg plugin.

What about eliminating this opt-in feature and enabling it by default in the Gutenberg plugin so that we can get more user feedback?

cc @carolinan @talldan @richtabor

[carolinan]

Was the issue with the spacebar in Firefox solved? I don't think it should be moved out of experimental until it is solved.

[t-hamano]

Was the issue with the spacebar in Firefox solved? I don't think ti should be move out of experimental until it is solved.

This issue was reported as #49679 and I am aware of this issue. However, I think this issue is part of being "experimental".
Of course, it would be ideal if this issue was fixed before being published 😅

[richtabor]

I added #49679 to the Polish board to get more eyes on it, but I'm fine with moving the block out of Experimental settings.

[t-hamano]

I'm trying to fix the Firefox issue in #50540.