docs/building.md: add docs for building Kilo and the website (#177)

* docs/building.md: add docs for building Kilo and the website

Signed-off-by: leonnicolas <leonloechner@gmx.de>

Update docs/building_kilo.md

Co-authored-by: Lucas Servén Marín <lserven@gmail.com>

* Apply suggestions from code review

Co-authored-by: Lucas Servén Marín <lserven@gmail.com>

Co-authored-by: Lucas Servén Marín <lserven@gmail.com>

website/docs/building_kilo

@@ -0,0 +1,5 @@
+---
+id: building_kilo
+title: Building Kilo
+hide_title: true
+---

website/docs/building_website

@@ -0,0 +1,5 @@
+---
+id: building_website
+title: Building the Website
+hide_title: true
+---

website/sidebars.js

@@ -14,6 +14,11 @@ module.exports = {
       label: 'Reference',
       items: ['annotations', 'kg', 'kgctl', 'api'],
     },
+    {
+      type: 'category',
+      label: 'Contributing',
+      items: ['building_kilo', 'building_website'],
+    },
     //Features: ['mdx'],
   ],
 };