Update to the intro docs 🪄

[ckavili]

Hey,

I am going through the docs and made some changes in the intro ordering to make onboarding much more effective for the participans and setting clearer expectations from the start. I hope it's alright 🙏 Changes I made:

1. Prerequisites moved up - Users know immediately if they're qualified for the workshop
2. ParasolCloud scenario introduced early - Establishes business context before diving into technical concepts
3. Eliminated redundancy:
   - Removed duplicate P95/P99 explanation from submodule 1 (already covered in detail earlier)
   - Merged "What you'll learn" and "What you'll demonstrate" into one comprehensive section
   - Removed duplicate "Workshop structure and timing" section
   - Removed duplicate "What success looks like" section
4. Better narrative flow:
   - Prerequisites → Business Context → Technical Concepts → Learning Outcomes → Workshop Modules → Success Criteria → FAQ → Ready to Begin
5. Cleaner transitions:
   - Each section now flows logically to the next
   - The "Ready to begin?" section now references what they've just learned (prerequisites, scenario, goals)

The new structure follows a clear progression: Who should attend → What problem you'll solve → Why it matters → What you'll learn → How you'll learn it → What success looks like → Common questions → Let's go!

FYI @deewhyweb 😌

[ckavili]

(PS: I also made some changes in the next modules as I am going along, so the PR is no long just for intro docs 🙈)