[Bug]: main contains Frontmatter and Link Validation errors

[martinpeck]

Component

Instruction Files

Bug Description

The PR template asks PR authors to run both of these commands:

• Frontmatter validation: npm run lint:frontmatter
• Link validation: npm run lint:md-links

However, both of these generate a number of errors and warnings, and it doesn't look like either of these are run as part of the automation builds.

These should either be validated as part of the automated builds in GH Actions, or removed from the list of instructions for PR authors.

Expected Behavior

No errors when running these locally against a fresh clone of the repo.

Steps to Reproduce

No response

Additional Context

No response

[WilliamBerryiii]

Fixed via #102.

Changes made:

• Fixed schema validation bug in Validate-MarkdownFrontmatter.ps1 — root-only file pattern matching now correctly scopes to repo root
• Added missing ms.topic enum values to schemas:
• base-frontmatter.schema.json — added guide, hub-page, architecture
• docs-frontmatter.schema.json — added architecture, research
• root-community-frontmatter.schema.json — added guide, hub-page
• Added missing frontmatter fields (author, ms.date, ms.topic) to docs/contributing/ files
• Fixed typo conceptual → concept in docs/rpi/README.md
• Both npm run lint:frontmatter and npm run lint:md now pass cleanly. Frontmatter validation is enforced in CI via the markdown-docs.yaml workflow.