Adding explanatory text to electricity-per-capita-world.md

[willemfrishert]

Task of #14: Add English texts to the published infographics

Preview Build

Current preview build is available at https://en-facts-on-climate--preview-electricity-per-capita-wo-xkc3boh5.web.app/infographics/electricity-per-capita-world

What does this PR do?

• bulk-translated the Czech text to English using DeepL for electricity-per-capita-world.md
• Use Grammarly to proofread the texts.
• Updated Glossary for English to support reference to w (watt & watt-hour).
  • Note: this is branched off of eeef83e which introduced the glossary for Adding explanatory text to _infographics/climate/map-temperature-change.md #16
  • Kept the statistic of Czech household but updated link to Czech Statistical Office to be in English.

Commented out links:

• Commented out link in text (using html comments) as these are (not yet) available in English:
  • explainers/carbon-neutrality - https://faktaoklimatu.cz/explainery/uhlikova-neutralita

[tjarnikova]

All comments addressed, looks good.

[mukrop]

I've rebased the branch and resolved conflicts. Though, I have to say the history you created is quite convoluted with multiple merged from master and similar unfortunate moments.
@willemfrishert, I would strongly suggest to keep linear history even during development. That is, if you need updated files from current master, rebase the whole branch there (rather then making a merge commit from master there). If there's a conflict, you'll resolve it there and just once. The final rebase on master will then be clean with no need to rebase and resolve the same conflicts again.

@willemfrishert, would you be able to clean out the current history – rebase all open branches on master to prevent rebase conflicts on final merge? Would you take it as a developmental git challenge? Or should I do it? Or would you appreciate more detailed explanation what I suggest and why? Let me know :-). (Maybe in the Slack is a more appropriate place.)