docs: comprehensive documentation updates and modernization

- Update BUILDING.md with current build system information
- Modernize various README files across the project
- Update CHANGELOG.md with recent changes
- Improve documentation consistency and formatting
- Update platform-specific documentation (iOS, Electron, Docker)
- Enhance test documentation and build guides

test-playwright/README.md

@@ -29,6 +29,7 @@ Tests are organized by feature area and numbered for execution order:
 ## Prerequisites
 
 1. Endorser server running locally (see TESTING.md for setup)
+
    ```bash
    git clone https://github.com/time-endorser/endorser-ch.git
    cd endorser-ch
@@ -37,10 +38,13 @@ Tests are organized by feature area and numbered for execution order:
    cp .env.local .env
    NODE_ENV=test-local npm run dev
    ```
+
 2. Playwright browsers installed:
+
    ```bash
    npx playwright install
    ```
+
 3. For mobile testing:
    - XCode (for iOS)
    - Android Studio or connected Android device
@@ -67,16 +71,19 @@ npx playwright test -c playwright.config-local.ts --trace on test-playwright/40-
 ### Test Environment Options
 
 1. Local Endorser Server (default):
+
    ```bash
    NODE_ENV=test-local npm run dev
    ```
 
 2. Global Test Server:
+
    ```bash
    VITE_DEFAULT_ENDORSER_API_SERVER=https://test-ledger.time.com npm run dev
    ```
 
 3. Minimal Test Data:
+
    ```bash
    rm ../endorser-ch-test-local.sqlite3
    NODE_ENV=test-local npm run flyway migrate
@@ -114,6 +121,7 @@ For more detailed troubleshooting, see TESTING.md.
 ## Contributing
 
 When adding new tests:
+
 1. Follow the existing naming convention
 2. Use testUtils.ts for common operations
 3. Add appropriate comments and documentation
@@ -124,4 +132,4 @@ When adding new tests:
 
 - [TESTING.md](./TESTING.md) - Detailed testing guide
 - [Playwright Documentation](https://playwright.dev/docs/intro)
-- Endorser server documentation for test setup 
+- Endorser server documentation for test setup