docs: Consolidate setup guides into a single GETTING_STARTED.md

This commit consolidates all setup and production-readiness documentation into a single, comprehensive `GETTING_STARTED.md` file.

The previous documentation was fragmented across `MANUAL_SETUP_REQUIRED.md`, `NEXT_STEPS.md`, and `docs/PRODUCTION_SETUP.md`, which is now all removed. The new guide provides a unified, step-by-step walkthrough from initial project setup to Play Store deployment.

Additionally, project-specific names like "Zencastr" have been replaced with generic "App" placeholders in dispatcher enums and service class names to align with the template's reusable nature.

### Key Changes:

-   **Documentation Consolidation:**
    -   Created `GETTING_STARTED.md` to serve as the single source of truth for setup.
    -   Deleted `MANUAL_SETUP_REQUIRED.md`, `NEXT_STEPS.md`, and `docs/PRODUCTION_SETUP.md`.
    -   Updated all references in `README.md`, `CLAUDE.md`, and other documentation to point to the new `GETTING_STARTED.md` file.
    -   Improved Firebase setup instructions to clarify the need for multiple package name variants (`dev`, `prod`, `debug`).

-   **Code Generalization:**
    -   Renamed `ZencastrDispatchers` enum to `AppDispatchers` to remove project-specific branding.
    -   Renamed `ZencastrFCMService` to `AppFCMService`.
    -   Updated all related use cases, modules, and `AndroidManifest.xml` to use the new generic names.
    -   Changed the preference DataStore filename from `zencastr_prefs` to the more generic `myapp_prefs`.

Author: moehamade

.github/workflows/README_DEPLOY.md

@@ -107,13 +107,13 @@ git push
 
 ## Detailed Setup Guide
 
-See [`MANUAL_SETUP_REQUIRED.md`](../../MANUAL_SETUP_REQUIRED.md) for complete step-by-step instructions.
+See [`GETTING_STARTED.md`](../../GETTING_STARTED.md) for complete step-by-step instructions.
 
 ---
 
 ## Need Help?
 
 - **Build issues**: Check `build-release.yml` workflow logs
-- **Keystore generation**: See `MANUAL_SETUP_REQUIRED.md#3`
-- **Play Store setup**: See `MANUAL_SETUP_REQUIRED.md#5`
+- **Keystore generation**: See `GETTING_STARTED.md#41-generate-release-keystore`
+- **Play Store setup**: See `GETTING_STARTED.md#step-5-play-store-deployment-setup-when-ready-to-publish`
 - **CI/CD issues**: Check `.github/workflows/README.md`

CLAUDE.md

@@ -18,7 +18,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
    - Create Firebase project at [Firebase Console](https://console.firebase.google.com)
    - Add Android app with package: `com.example.myapp` (or your chosen package name)
    - Download `google-services.json` and place in `app/` directory
-   - See [MANUAL_SETUP_REQUIRED.md](MANUAL_SETUP_REQUIRED.md#1-firebase-configuration) for detailed instructions
+   - See [GETTING_STARTED.md](GETTING_STARTED.md#12-firebase-configuration) for detailed instructions
    - **Note**: Update package name after rebranding the project
 
 2. **Verify Setup**:
@@ -37,11 +37,11 @@ Add to GitHub repository secrets (**Settings → Secrets and variables → Actio
 ### Optional: Release Signing (for Play Store)
 
 Only needed when ready to publish to Play Store:
-- Generate keystore: See `MANUAL_SETUP_REQUIRED.md`
+- Generate keystore: See `GETTING_STARTED.md`
 - Create `keystore.properties` file (gitignored)
 - Uncomment signing config in `app/build.gradle.kts`
 
-For detailed setup instructions, see `MANUAL_SETUP_REQUIRED.md` and `NEXT_STEPS.md`.
+For detailed setup instructions, see `GETTING_STARTED.md`.
 
 ## Build Commands
 
@@ -376,7 +376,7 @@ Example: `https://example.com/content/123`
 
 **Required**: Add `google-services.json` from Firebase Console to `app/` directory.
 
-See [MANUAL_SETUP_REQUIRED.md](MANUAL_SETUP_REQUIRED.md#1-firebase-configuration) for detailed setup instructions:
+See [GETTING_STARTED.md](GETTING_STARTED.md#12-firebase-configuration) for detailed setup instructions:
 1. Create Firebase project
 2. Add Android app with your package name (e.g., `com.example.myapp`)
 3. Download `google-services.json`
@@ -559,7 +559,7 @@ git push origin v1.0.0
 ```
 
 **Deploy Workflow** (disabled by default):
-- See `MANUAL_SETUP_REQUIRED.md` for enabling Play Store deployment
+- See `GETTING_STARTED.md` for enabling Play Store deployment
 - Requires keystore setup and Play Store service account
 
 ## Documentation
@@ -588,9 +588,7 @@ Located in `docs/api/`:
 ### Production Setup and Implementation
 
 Production readiness documentation:
-- **`MANUAL_SETUP_REQUIRED.md`** - Step-by-step setup guide (Firebase, keystore, Play Store)
-- **`NEXT_STEPS.md`** - Quick reference and current status
-- **`docs/PRODUCTION_SETUP.md`** - Release keystore, signing, Play Store submission
+- **`GETTING_STARTED.md`** - Complete setup guide from local dev to Play Store deployment
 
 **Current Status: 100% Development Ready** 🎉