Add comprehensive analysis of peripheral documentation completeness

[Copilot]

Analysis reveals 85% of peripheral documentation (64/75 files) is incomplete or missing content. Core peripherals like ADC, PWM, SPI, GPIO, Counter, and Watchdog have skeletal structure only (4-16 words). Only 20% include usage examples.

Deliverables

Root Directory

• PERIPHERAL_DOCS_SUMMARY.md - Executive summary with prioritized action items

doc/ Directory

• peripheral_documentation_analysis.md - Detailed analysis with metrics for all 75 files
• peripheral_docs_by_category.txt - Simple categorized listing
• PERIPHERAL_DOCS_README.md - Classification methodology and recommendations

Classification

Files categorized by completeness:

• Empty/Nearly Empty (12 files, 16%): < 20 words, skeletal structure only
• Very Minimal (27 files, 36%): 20-100 words, lacks detail and examples
• Incomplete (25 files, 33%): 100-300 words, missing key sections (examples, overview, or config)
• Complete (11 files, 15%): > 300 words with comprehensive coverage

Key Metrics

• Average word count: 225 words/file (median: 94)
• API references present: 87% (but often lack context)
• Configuration info: 64%
• Usage examples: 20% (critical gap)

Examples

Empty (counter.rst, 4 words):

Counter
#######

Overview
********


API Reference
*************

.. doxygengroup:: counter_interface

Well-documented (i3c.rst, 1757 words): Overview, configuration, multiple code examples, comprehensive API reference, error handling, use cases.

Files like i3c.rst, can/controller.rst, and rtc.rst serve as templates for improvement efforts.

Original prompt

give a list of all the peripherals doc pages that are either completely empty or incomplete
ideally your analysis ends up being some kind of nice and concise report

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