Enrich completion name for some country flags

[eevmanu]

after reviewing local files from this extension:

• ${HOME}.vscode/extensions/bierner.emojisense-0.10.0/dist/extension.js
• ${HOME}.vscode/extensions/bierner.emojisense-0.10.0/dist/web/extension.js

I noticed that there are some country flags which completion name is too short to find them quickly either by autocompletion with :smile syntax or emoji picker, like:

• cn for 🇨🇳
• de for 🇩🇪
• es for 🇪🇸
• tr for 🇹🇷

there are other that are not so smoothly to find them on the emoji picker, like it, fr, gb, kr, ru, us, jp

so my suggestion is to enrich with more completion names those emoji (unicode) country flags which the only completion name they have is too small (I know completion names are country codes, but I think there is room for improvement related to user experience when searching for emoji country flag):

• 🇨🇳 - china
• 🇩🇪 - germany
• 🇪🇸 - spain
• 🇮🇹 - italy
• 🇹🇷 - turkey
• 🇫🇷 - france
• 🇯🇵 - japan
• 🇬🇧 - great_britain, united_kingdom
• 🇰🇷 - south_korea
• 🇷🇺 - russia
• 🇺🇸 - usa, united_states_of_america

that's it 👍🚀