add "what does gobang come from" (#94)

* add "what does gobang come from"

* move section

README.md

@@ -25,6 +25,10 @@ A cross-platform TUI database management tool written in Rust
 - [ ] Custom theme settings
 - [ ] Support the other databases
 
+## What does "gobang" come from?
+
+gobang means a Japanese game played on goban, a go board. The appearance of goban looks like table structure. And I live in Kyoto, Japan. In Kyoto city, streets are laid out on a grid (We call it “goban no me no youna (碁盤の目のような)”). They are why I named this project "gobang".
+
 ## Installation
 
 ### Homebrew (Linux/macOS)