docs: hackathon docs update

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[greptile-apps]

Greptile Overview

Summary

This PR enhances the hackathon documentation by adding the hackathon-starter page to the navigation structure and significantly expanding its content with AI-native application concepts.

Key changes:

• Added getting-started/hackathon-starter to the navigation in docs.json
• Expanded hackathon starter content with comprehensive "What are AI-native applications?" section
• Added embedded YouTube video demonstrating AI-native email concepts
• Enhanced value proposition by mentioning YC company usage
• Updated MCP server references to be more inclusive ("Cursor and more!")

Minor issues:

• One typo found and reported: "yorurself" should be "yourself" on line 41

Confidence Score: 4/5

• This PR is safe to merge with minimal risk - it only updates documentation content
• Score of 4 reflects low-risk documentation changes with one minor typo that should be fixed but doesn't prevent merging
• The hackathon-starter.mdx file has one typo that should be corrected before or after merge

Important Files Changed

File Analysis

Filename	Score	Overview
docs/docs.json	5/5	Added hackathon-starter page to navigation structure
docs/getting-started/hackathon-starter.mdx	4/5	Expanded content with AI-native applications section, embedded video, and minor text improvements

Sequence Diagram

sequenceDiagram
    participant D as Developer
    participant Doc as Documentation System
    participant Nav as Navigation Structure
    participant U as User

    D->>Doc: Update hackathon-starter.mdx
    D->>Nav: Add hackathon-starter to docs.json
    Note over Doc,Nav: Content includes AI-native concepts,<br/>embedded video, and expanded guidance
    Nav->>U: Expose hackathon-starter in navigation menu
    U->>Doc: Access enhanced hackathon documentation
    Doc->>U: Display comprehensive AI-native app guide

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[greptile-apps]

syntax: Typo: "yorurself" should be "yourself"

Suggested change

	Most users don't even know what AI is, much less how to best prompt them. Writing out prompts can often be as tedious as just doing the task yorurself.
	Most users don't even know what AI is, much less how to best prompt them. Writing out prompts can often be as tedious as just doing the task yourself.

Prompt To Fix With AI

This is a comment left during a code review.
Path: docs/getting-started/hackathon-starter.mdx
Line: 41:41

Comment:
syntax: Typo: "yorurself" should be "yourself"

```suggestion
Most users don't even know what AI is, much less how to best prompt them. Writing out prompts can often be as tedious as just doing the task yourself.
```

How can I resolve this? If you propose a fix, please make it concise.