docs: final presentation and app icon refresh

[M1RK02]

Description

Adds the final project presentation and refreshes the app launcher icon. No application code, logic, or schema is touched — this is a documentation/asset-only PR.

• Adds docs/presentation.pdf (final presentation deliverable).
• Removes the interim docs/presentation_outline.md now that the finished PDF supersedes it.
• Replaces the app icon source (app/assets/icon/app_icon.png) and the regenerated Android/iOS launcher icon assets.

Related Task

• Vertical: C
• Phase: Presentation / phase-gate deliverables
• Reviewer: @ChristianPrendin

Shared Contracts

• None
• Match document shape
• Facility status field (facilities/{id}.status / .currentMatchId)
• Queue position write (facilities/{id}/queue/{uid}.position)

Shared Files

• This PR does not touch them, OR it was opened the same day the changes were made and the other two devs were pinged.

Breaking Changes

• No
• Yes (describe what changed and who is affected below)

Checklist

• Branched off develop and rebased on develop before opening this PR (no merge commits).
• My code follows the Dart style guide (dart format applied).
• I have not introduced any hardcoded user-facing strings (used ARB files if applicable).
• CI pipeline is green (I have run flutter analyze and flutter test locally, OR the GitHub Actions check on this PR has passed).
• If this PR adds a new sport, the ScoringStrategy contract remains unmodified.
• If this PR introduces a new Cubit, it emits an initial state synchronously.
• Firestore writes affecting ELO or queue position use atomic transactions.
• If this PR shows facility availability ("free"/"empty" status), the disclaimer footer is present via the availabilityDisclaimerShort ARB key.

UI Changes (If applicable)

N/A — launcher icon asset only, no in-app screen changes.

[ChristianPrendin]

Namo!

[github-actions]

LCOV of commit e66051a during Flutter CI #112

Summary coverage rate:
  lines......: 90.4% (9427 of 10432 lines)
  functions..: no data found
  branches...: no data found

Files changed coverage rate: n/a