Add D4D HTML and YAML files to GitHub Pages

Changes:
- Update .gitignore to track docs/html_output/ and docs/yaml_output/
- Add curated comprehensive datasheets (HTML + YAML) for AI-READI, CM4AI, VOICE
- Add GPT-5 synthesized datasheets (HTML + YAML) for all 4 projects
- Add individual dataset datasheets (FAIRHub, Dataverse, PhysioNet)
- Add d4d_examples.md page with links to all datasheets
- Add datasheet-common.css for styling

This enables GitHub Pages to serve the D4D datasheet HTML files that are linked from the README.

Author: realmarcin

.gitignore

@@ -1,7 +1,15 @@
-/docs/
+# Ignore generated docs but keep GitHub Pages content
 /project/docs/
 /tmp/
 
+# Track GitHub Pages content in docs/
+# (Generated markdown/html files from LinkML are ignored, but D4D examples are tracked)
+docs/*
+!docs/*.md
+!docs/*.css
+!docs/html_output/
+!docs/yaml_output/
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

docs/about.md

@@ -0,0 +1,3 @@
+# data-sheets-schema
+
+A LinkML schema for Datasheets for Datasets.

docs/d4d_examples.md

@@ -0,0 +1,81 @@
+# D4D Examples
+
+This page provides links to rendered Datasheet for Datasets (D4D) examples for Bridge2AI data generating projects.
+
+## Curated Comprehensive Datasheets
+
+These are the most comprehensive datasheets for each project, created through extensive AI-powered synthesis:
+
+### AI-READI
+- [Human Readable HTML](html_output/concatenated/curated/AI_READI_human_readable.html)
+- [LinkML Format HTML](html_output/concatenated/curated/AI_READI_linkml.html)
+- [Download YAML](yaml_output/concatenated/curated/AI_READI_curated.yaml)
+
+### CM4AI
+- [Human Readable HTML](html_output/concatenated/curated/CM4AI_human_readable.html)
+- [LinkML Format HTML](html_output/concatenated/curated/CM4AI_linkml.html)
+- [Download YAML](yaml_output/concatenated/curated/CM4AI_curated.yaml)
+
+### VOICE
+- [Human Readable HTML](html_output/concatenated/curated/VOICE_human_readable.html)
+- [LinkML Format HTML](html_output/concatenated/curated/VOICE_linkml.html)
+- [Download YAML](yaml_output/concatenated/curated/VOICE_curated.yaml)
+
+## GPT-5 Synthesized Datasheets
+
+These datasheets were automatically synthesized from multiple documents using GPT-5:
+
+### AI-READI
+- [Synthesized HTML](html_output/concatenated/AI_READI_d4d_synthesized.html)
+- [Download YAML](yaml_output/concatenated/gpt5/AI_READI_d4d.yaml)
+
+### CHORUS
+- [Synthesized HTML](html_output/concatenated/CHORUS_d4d_synthesized.html)
+- [Download YAML](yaml_output/concatenated/gpt5/CHORUS_d4d.yaml)
+
+### CM4AI
+- [Synthesized HTML](html_output/concatenated/CM4AI_d4d_synthesized.html)
+- [Download YAML](yaml_output/concatenated/gpt5/CM4AI_d4d.yaml)
+
+### VOICE
+- [Synthesized HTML](html_output/concatenated/VOICE_d4d_synthesized.html)
+- [Download YAML](yaml_output/concatenated/gpt5/VOICE_d4d.yaml)
+
+## Individual Dataset Datasheets
+
+These datasheets were created from specific dataset metadata sources:
+
+### AI-READI (FAIRHub v3)
+- [Human Readable](html_output/D4D_-_AI-READI_FAIRHub_v3_human_readable.html)
+- [LinkML Format](html_output/D4D_-_AI-READI_FAIRHub_v3_linkml.html)
+
+### CM4AI (Dataverse v3)
+- [Human Readable](html_output/D4D_-_CM4AI_Dataverse_v3_human_readable.html)
+- [LinkML Format](html_output/D4D_-_CM4AI_Dataverse_v3_linkml.html)
+
+### VOICE (PhysioNet v3)
+- [Human Readable](html_output/D4D_-_VOICE_PhysioNet_v3_human_readable.html)
+- [LinkML Format](html_output/D4D_-_VOICE_PhysioNet_v3_linkml.html)
+
+## About the Datasheets
+
+### Curated Comprehensive Datasheets
+The **Curated Comprehensive Datasheets** represent the most complete and authoritative metadata for each project, created through extensive AI-powered synthesis of multiple data sources and documentation. These files include both human-readable HTML renderings and downloadable YAML source files.
+
+### GPT-5 Synthesized Datasheets
+The **GPT-5 Synthesized Datasheets** were created by:
+1. Concatenating multiple project-related documents in reproducible order
+2. Processing with GPT-5 to extract and synthesize D4D metadata
+3. Validating against the LinkML schema
+4. Rendering to human-readable HTML format
+
+These provide automated comprehensive project-level metadata and include both HTML views and downloadable YAML files.
+
+### Individual Dataset Datasheets
+The **Individual Dataset Datasheets** provide detailed metadata for specific datasets from each project's primary data repository (FAIRHub, Dataverse, PhysioNet).
+
+## Schema Information
+
+All datasheets conform to the [Datasheets for Datasets](https://arxiv.org/abs/1803.09010) framework by Gebru et al., implemented using the [Bridge2AI LinkML schema](https://github.com/bridge2ai/data-sheets-schema).
+
+The YAML files can be validated, transformed, and processed using LinkML tools. See the [LinkML documentation](https://linkml.io/) for more information.