docs: Add course content for Day 0 (#1929)

* docs: Add course content for Day 0

* added static

* added videos and removed video template files

* wording

* added youtube links

* added deliverable

* checked code

* added images

* added image links

* fixed image

* linebreak under video

* started working on day 1

* updated pitstop structure

* pitstop Reflect on Your Findings

* pitstop fix

* removed filtering from build-simple-vector-search and used create_payload_index instead of unindexed_filtering_retrieve in pitstop

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Co-authored-by: Kirstin <kirstin.taufertshoefer@qdrant.com>

qdrant-landing/content/course/essentials/day-0/_index.md

@@ -1,13 +1,22 @@
 ---
-title: Day 0
+title: "Day 0: Setup and First Steps"
 isLesson: true
 weight: 1
 ---
 
 {{< date >}} Day 0 {{< /date >}}
 
-# Setup, Orientation & “Hello Qdrant!”
+# Setup and First Steps
 
-Welcome to Day 0! Today we’ll lay the foundation for everything in the course. Let’s get started with setting up your environment, and creating your first collection. By the end of this, you’ll have your first similarity search running! In total, the three videos are about 20 minutes total.
+Get started with Qdrant by setting up your environment and building your first vector search application.
+
+---
+
+## Today’s path
+
+1. Qdrant Cloud Setup
+2. Implementing a Basic Vector Search
+3. Project: Building Your First Vector Search System
+
+By the end, you’ll have a working Qdrant setup and a complete first search running.
 
-## Video 01: Course Overview