REPL

REPL stands for "read-eval-print loop". It's a common type of program that allows for interactivity. You type in a command, and the program evaluates it and prints the result. You can then type in another command, and so on.

Your native terminal's command line is a REPL! Our Pokedex will also be a REPL. In this step, we're just going to build the bones of the REPL: a loop that parses and cleans an input and prints the first word back to the user. Here is what your program should be able to do after this step:

> go run .
Pokedex > help me
help
Pokedex > Exit
exit
Pokedex > WHAT even is a pokeman?
what

Pokedex > is our own custom command line prompt. The program waited and recorded my input (in the first instance, help me) and didn't continue until I pressed enter.

Assignment

Remove your "Hello, World!" logic.
Create support for a simple REPL
- Wait for user input using bufio.NewScanner (this blocks the code and waits for input, once the user types something and presses enter, the code continues and the input is available in the returned bufio.Scanner)
- Start an infinite for loop. This loop will execute once for every command the user types in (we don't want to exit the program after just one command)
  - Use fmt.Print to print the prompt Pokedex > without a newline character
  - Use the scanner's .Scan and .Text methods to get the user's input as a string
  - Clean the user's input string
  - Capture the first "word" of the input and use it to print: Your command was: <first word>
Test your program. Here's my example session:

wagslane@MacBook-Pro-2 pokedexcli % go run .
Pokedex > well hello there
Your command was: well
Pokedex > Hello there
Your command was: hello
Pokedex > POKEMON was underrated
Your command was: pokemon

You can terminate the program by pressing ctrl+c.

Run the CLI again and tee the output (copies the stdout) to a new file called repl.log (and .gitignore the log).

go run . | tee repl.log

Use this as the first input: CHARMANDER is better than bulbasaur.
Use this as the second input: Pikachu is kinda mean to ash.
Terminate the program by pressing ctrl+c.

Run and submit the CLI tests.