Hextra theme (#1)

* Adapt theme
* Update Contents to match with new theme
* chore: few updates
* adapt HomePage
* Add icons and french version
* fix fr homepage
* Fix Netlab view
* Fix Netlab articles
* devpod post
* French version of DevPod
* my_first_lab

content/netlab/_index.md

@@ -0,0 +1,16 @@
+---
+title: "Netlab"
+cascade:
+  type: docs
+---
+
+<!-- markdownlint-disable MD033 MD034-->
+
+{{< hextra/hero-subtitle >}}
+  Deep Dive using NetLab
+{{< /hextra/hero-subtitle >}}
+
+{{< cards >}}
+  {{< card link="/netlab/netlab/" title="What is a Netlab" subtitle="What and Why we use NetLab" icon="science" >}}
+  {{< card link="/netlab/first_lab/" title="My First Lab" subtitle="How to deploy an NetLab using DevPod" icon="docker" >}}
+{{< /cards >}}