Tendermint: Tendermint Core Guides

[melekes]

1. [x] Writing a built-in Tendermint Core application in Go (assigned to @melekes)
2. [x] Writing a Tendermint Core application in Go (assigned to @melekes)
3. [ ] Writing a Tendermint Core application in Javascript
4. [x] Writing a Tendermint Core application in Java (@climber73)
5. [ ] Writing a Tendermint Core application in Rust
6. [ ] Writing a Tendermint Core application in C++
7. [x] Writing a Tendermint Core application in Kotlin (@climber73)

External contributions are welcome 🏆 Please leave a comment if you want to write a specific guide for X language. When ready for review, send a PR to master branch.

FAQ:
1) Does it have to be a specific application?
No, any application will do.
2) Do I have to follow some structure?
Yes, see the first guide in the series https://github.com/tendermint/tendermint/blob/master/docs/guides/go-built-in.md.

Refs https://github.com/tendermint/tendermint/issues/3016, https://github.com/tendermint/tendermint/issues/3169

[climber73]

I'm going to describe Java way (and if needed - Kotlin also)