feat: Add country spain and operator renfe

[MoritzWeber0]

Description

Add information about the renfe operator. A page for spain was added as navigation anchor, but doesn't contain any useful information yet.

Checklist

• Changed the date in updatet content pages
• Check the License of new pictures (non-commercial use without attribution)

The content was modified in the following languages:

• English
• German

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[therobrob]

expanders can be grouped (name-attribute).

Example:
{{< expander "InterCity Express (ICE)" category >}}
{{< expander "InterCity (IC)" category >}}

[MoritzWeber0]

expanders can be grouped (name-attribute).

Example: {{< expander "InterCity Express (ICE)" category >}} {{< expander "InterCity (IC)" category >}}

Done, thanks for the hint 👍

[MoritzWeber0]

@Willy102 Do you already know when you'll have time to review the PR? :)

[Willy102]

@MoritzWeber0 Added some information, changed it a bit and added the spain country site. The english translation is missing in both cases and we need to merge it. Can you have a look?

[MoritzWeber0]

@MoritzWeber0 Added some information, changed it a bit and added the spain country site. The english translation is missing in both cases and we need to merge it. Can you have a look?

Thanks ❤️. I'll add the English translation.

[MoritzWeber0]

English translation is up-to-date, so I'd say it's ready to go.