Add Select All On Page translation

[sebacastroh]

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About this PR

I noticed that the text "Select All On Page" used in resources/lang/components/table/tr/bulk-actions.blade.php wasn't being translated.

I added the text in the english and spanish translation files.

If you want, you can send me other translations and I can add it to the PR.

[lrljoe]

Thanks for the translation, I'll get it merged over the weekend.

Are you happy for me to defer to you for Spanish translations in the future? I'm steadily building a list of translation contributors, particularly as we start to look at v3.

[sebacastroh]

Yeah, no problem 😉

[sebacastroh]

Updated README.md based on dev branch

[lrljoe]

Merged into develop. Thanks for the contrib, I'll add you into the list of translation contributors shortly.