docs: replace presentation with reveal.js slides (#495)

- Add new reveal.js presentation in docs/src/presentation/
- Move presentation link to Introduction section for visibility
- Remove old examples/presentation/ directory with markdown outlines
- Presentation covers: four layers, profiles, raw API, human commands, workflows, Docker, CI/CD, personas

Author: joshrotenberg

docs/src/SUMMARY.md

@@ -3,6 +3,7 @@
 # Introduction
 
 - [Overview](./introduction.md)
+- [Presentation](./presentation/index.md)
 - [Quick Start](./getting-started/quickstart.md)
 - [Installation](./getting-started/installation.md)
 
@@ -82,3 +83,5 @@
 - [Architecture](./developer/architecture.md)
 - [Libraries](./developer/libraries.md)
 - [Contributing](./developer/contributing.md)
+
+

docs/src/presentation/index.md

@@ -0,0 +1,31 @@
+# Presentation
+
+This section contains presentation materials for redisctl.
+
+## Slide Deck
+
+[View the redisctl presentation slides](slides.html)
+
+Use arrow keys to navigate, or press `?` for keyboard shortcuts.
+
+## Topics Covered
+
+- The problem: No CLI tooling for Redis Cloud/Enterprise
+- The solution: redisctl's four-layer architecture
+- Demo: Profile setup, Cloud operations, Enterprise operations
+- Raw API access for any endpoint
+- Support package automation
+- Output formats and JMESPath queries
+- Async operation handling
+- Library-first architecture for ecosystem tools
+- Use cases by persona
+- Installation and getting started
+
+## Presenting
+
+The slides use [reveal.js](https://revealjs.com/) and can be:
+
+- Navigated with arrow keys
+- Viewed in overview mode with `Esc`
+- Printed to PDF via `?print-pdf` query parameter
+- Shared via URL hash for specific slides