🚀 [Feature] Add Meta data to Spanish Pages

[Tirokk]

🚀 Feature

Add Meta data to Spanish Pages.

• relates #155

Todo

• [ ] see meta data of the equivalent pages of the other languages, if #155 is merged or push to this branch
  • [ ] clean up the meta data as well like in the equivalents
• [x] on page es/contact/ write Wolfgang Huß, 2º Presidente \\ Haferstr. 5c \\ 86179 Augsburg, Alemania
• [x] on home page remove commented part starting with Why free open source software?
• [ ] on page es/privacy-policy/ may set the links to GDPR from english to spanish version?