Add readme

Author: Dlorite

README.md

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+# Sysdig Query Translator
+
+## What it is?
+This is a tool created in GO that creates a C library to be used mainly by a Pyhton application. With this tool you can translate a sysdig promql query to a vanilla Prometheus query.
+
+## How to use it?
+You can import the library in your Python code and use it. The function RemoveSysdigLabelsInExpression expects two string as input:
+- The expresion itself
+- The extra scope you want to remove
+
+In the folder example you will find an example of how to integrate it in your Pyhton code.
+
+## Build
+If you want to build it by yourself just execute the build command of the makefile:
+
+```bash
+make build
+```
+This will create a folder library with the two needed files with the C library.