docslab MkDocs plugin

This MkDocs plugin uses docslab to make code blocks interactive.

First, install the mkdocs-docslab package from PyPI:

pip install mkdocs-docslab

Then, add it to your mkdocs.yml file.

plugins:
  - docslab

To make a code block interactive, add docslab to the meta string, e.g.,

```{ .cpp .docslab }
// hardshare: heliumdev/cubecell-draw-demo
// command: source .platformio/penv/bin/activate && cd m/Heltec-CubeCell-Board/examples/cubecell-helium-us915-basic && pio run -t upload && pio device monitor
// destpath: m/Heltec-CubeCell-Board/examples/cubecell-helium-us915-basic/src/main.cpp
// repoUrl: https://github.com/helium/longfi-platformio.git
// ---
#include "Arduino.h"

void setup()
{
    Serial.begin(115200);
}

void loop()
{
    delay(1000);
    Serial.println("Hola, mundo!");
}
```