README.md modification and hello world go

diff --git a/README.md b/README.md
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 # TinyThreePassCompiler
+
+# The problem
+
+This problem is derived from the [Tiny Three-Pass Compiler kata from codewars](https://www.codewars.com/kata/5265b0885fda8eac5900093b)
+and  basically it is about writing a three-pass compiler for a simple programming
+language into a small assembly language which syntax is like follows:
+
+```bash
+[ a b ] a*a + b*b
+```
+> a^2 + b^2
+
+```bash
+[ first second ] (first + second) / 2
+```
+> average of two numbers
+
+
+# How is this implementation different from the original kata
+
+The plan for this implementation is to make it work not with JSON structures but
+with protocol buffers, the reason is basically just to practice those technologies
+but it is also true that in a real compiler saving and transporting binaries and
+not text as it would be the case for JSON could mean a significant improvement.
+

diff --git a/compiler.go b/compiler.go
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+++ b/compiler.go
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+package main
+
+import "fmt"
+
+func main() {
+    fmt.Println("Hello, world.")
+}

diff --git a/go.mod b/go.mod
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+module TinyThreePassCompiler
+
+go 1.19