Add custom schema documentation generator to replace @adobe/jsonschema2md

[VinitaSilaparasetty]

Problem

The existing @adobe/jsonschema2md tool produces poor-quality documentation with:

• Too many "Untitled/Unknown" labels
• Arrays listed as top-level items in confusing ways
• Lack of customization for human-readable output

As mentioned in the original issue, the default generator doesn't provide the needed customization for useful documentation.

Solution

This PR introduces a custom JavaScript-based schema documentation generator that directly addresses these issues:

✅ Fixes the specific problems:

• Eliminates "Untitled/Unknown" labels by using actual property names from the schema
• Handles arrays intelligently:
  • Object arrays → documents the object structure with properties
  • Primitive arrays → summarized as "array of [type]"
• Produces clean, human-readable Markdown with proper formatting and structure

🏗️ Implementation:

• New script: scripts/generate-schema-docs.js (zero external dependencies)
• New npm command: pnpm run build:schema
• Output: docs/schema-docs/configuration-schema.md
• Integrates with existing Turbo monorepo workflow

📋 Usage:

# Generate schema documentation
pnpm run build:schema

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[VinitaSilaparasetty]

@ryscheng This addresses the schema documentation quality issues by replacing the problematic @adobe/jsonschema2md output with a custom generator that eliminates "Untitled/Unknown" labels and handles arrays properly.

The script generates clean documentation from the Hasura Clickhouse schema and integrates with the existing monorepo workflow via pnpm run build:schema.

Key improvements:

• Uses actual property names instead of "Untitled/Unknown" labels
• Handles arrays intelligently (documents object properties, summarizes primitive arrays)
• Outputs human-readable Markdown to docs/schema-docs/
• Zero external dependencies, integrates with existing Turbo workflow

I've tested this locally and it produces clean, readable documentation.