Add Persian (Farsi) language support

[rafi-ghanbari]

This PR adds full Persian (Farsi) translation support to learnGitBranching.

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[pcottle]

Wow amazing thanks for your contribution @rafi-ghanbari ! I know its a lot of work to add a new translation for the entire app experience so I really appreciate it 👏

[pcottle]

wow and its 100% completed!

node scripts/translate.js --list-locales
Known locales and their translation status:
- en_US: 205/205 (100.00%)
  - Levels:  102/102
  - Strings: 103/103
- fa: 205/205 (100.00%)
  - Levels:  102/102
  - Strings: 103/103
- zh_CN: 193/205 (94.15%)
  - Levels:  102/102
  - Strings: 91/103
- fr_FR: 205/205 (100.00%)
  - Levels:  102/102
  - Strings: 103/103

[pcottle]

(just pushed the site)

[rafi-ghanbari]

Thank you I'm really happy I could help and glad to see it meet your standards , although the project required about a month of work, the outcome was certainly worth. I hope that Persian speakers who couldn't use this project before due to language barriers can now enjoy and access this open learning resource .

[pcottle]

Thank you I'm really happy I could help and glad to see it meet your standards , although the project required about a month of work, the outcome was certainly worth. I hope that Persian speakers who couldn't use this project before due to language barriers can now enjoy and access this open learning resource .

I hope so too!