Update Romanian locale

[ygorigor]

Romanian Translation

I can't mention any speakers of this language because I don't know such people here on Github.

[gvwilson]

Thanks @ygorigor - I'll try to find someone who can review this at our end and get it merged.

[Praemuntiacus]

The Romanian translations look good to me, with the exception of this: 'kde:': 'evaluarea densității nucleare:' – the correct translation is either 'Estimarea densității nucleului' or 'Estimarea densității prin nucleu'.

[rudenco]

Translation looks good ~ 97 % given there are direct simple clear translations like : source --> sursă, lat --> latitudine, lower fence --> limita inferioară ... , I gave the translation task to a few LLM's ( XAI GROK, ChatGPT, Gemini ) + added a few personal insights ( like for example KDE - the suggestion being to leave it like it is for kernel density estimation ).

Attached is a PDF ("Plotly.js - translation RO.pdf") saved from EXCEL with current suggestion provided on the second column and the potential other suggestions on the columns that follow.

Meaning of colours in PDF :
green - good translation - no other recommendations
purple - good translation - some recommendations available - check columns that follow ( may remain the same )
orange - good translation - potential other recommendations my apply
red - the only one is for KDE - as also mentioned by Praemuntiacus - here I would leave it like it is.
Plotly.js - translation RO.pdf

[gvwilson]

@ygorigor can you please incorporate these suggestions into your pull request and then tag me here or email me (greg.wilson@plot.ly) and I'll merge? thank you, and thanks to @Praemuntiacus and @rudenco for input.

[ygorigor]

Ok @gvwilson. I'll do it ASAP. Thanks

[ygorigor]

@gvwilson done

[gvwilson]

thank you!