* Updated code-of-conduct-bn with native translation accent.
Previously the translation was direct copy of google translation, which was bit hard to read throughly.
Now it's been updated with actual bangla native accent.
* Fixed miss spelling
* Fixed grammatical mistakes
* Create Code_of_conduct-ben.md
bengali translation of the Code of conduct
* Rename Code_of_conduct-ben.md to Code_of_conduct-bn.md
used bn as the language code
* Rename Code_of_conduct-bn.md to CODE_OF_CONDUCT-bn.md
* Rename CODE_OF_CONDUCT-bn.md to docs/CODE_OF_CONDUCT-bn.md
* add CoC link
Co-authored-by: Eric Hellman <eric@hellman.net>