🖊️ Clean up blog posts and stable URLs

[JFWooten4]

Summary

• fix obvious typo, spacing, and grammar slips in the TAD3 direct-trading post
• make blog post URLs date-free and reject permalink collisions
• apply the same narrow typo cleanup across the remaining blog posts while preserving quoted community text
• add short explicit heading anchors for verbose or punctuation-heavy headings, including secondary-markets
• rename the source directory from old_posts/ to blog/ and present these posts as active organizational references

Commit structure

1. direct-trading post typo cleanup
2. date-free blog post URL hardening
3. blog-wide typo cleanup
4. shorter heading anchors
5. rename old_posts/ to blog/ and remove archive-only labeling

Validation

• the directory move reuses the existing post tree, so post contents and bundled images are preserved exactly
• docusaurus.config.ts now reads from blog/ while routeBasePath remains /blog, so public post URLs do not change because of the folder rename
• the renamed tree contains blog/ and no old_posts/
• each commit was checked for a non-empty tree/diff and its intended changes before committing

[netlify]

❌ Deploy Preview for org-docs failed. Why did it fail? →

Name	Link
🔨 Latest commit	871b889
🔍 Latest deploy log	https://app.netlify.com/projects/org-docs/deploys/6aaa9b648256ec00084d1e5d