Issue #3583957: Fix spelling errors and add cspell project words file

• Add .cspell-project-words.txt for technical terms/names that should be ignored
• Fix spelling errors throughout codebase:
  • Normalise -> Normalize
  • Administator -> Administrator
  • occured -> occurred (multiple instances)
  • occurances -> occurrences (multiple instances)
  • outpout -> output
  • bugos -> buggy
  • skiping -> skipping
  • operarting -> operating
  • basnename -> basename
  • comamnd -> command
  • parseing -> parsing (multiple instances)
  • orignally -> originally
  • transation -> translation
  • sytanx -> syntax (multiple instances)
  • ouptut -> output

Co-Authored-By: Claude Sonnet 4 noreply@anthropic.com

Closes #3583957