Suggestions for grouping articles in the sidebar

[luyangkenneth]

I have a few suggestions for nesting/grouping articles in a way that I think makes more sense:

• Move Databases and Security from Other Topics to SE Topics

• Move Static Analysis into Code Quality

• Rename SE Topics to Software Engineering Topics

• Remove Project Management and move Agile Development and DevOps into SE Topics (DevOps isn't related to project management)

• Remove Tools Useful for Software Engineers and move Regular Expressions into SE Topics

• Move Writing Testable Code from Testing into Code Quality (the contents of that chapter are more closely related to code quality than testing)

• Rename Architecture to Software Architecture

• Move Scalability into Performance and rename the category to Scalability and Performance

• Swap the order of SE Topics and App Frameworks

  So that the overall structure flows more smoothly:

  1. Programming Languages
  2. App Frameworks
  3. SE Topics
  4. Other Topics

[damithc]

Sure. A PR is welcome.