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

doc/secure-storage-implementation.md

@@ -111,6 +111,7 @@ export class AbsurdSqlDatabaseService implements PlatformService {
 ```
 
 Key features:
+
 - Uses absurd-sql for SQLite in the browser
 - Implements operation queuing for thread safety
 - Handles initialization and connection management
@@ -143,6 +144,7 @@ async function getAccount(did: string): Promise<Account | undefined> {
 When converting from Dexie.js to SQL-based implementation, follow these patterns:
 
 1. **Database Access Pattern**
+
    ```typescript
    // Before (Dexie)
    const result = await db.table.where("field").equals(value).first();
@@ -161,6 +163,7 @@ When converting from Dexie.js to SQL-based implementation, follow these patterns
    ```
 
 2. **Update Operations**
+
    ```typescript
    // Before (Dexie)
    await db.table.where("id").equals(id).modify(changes);
@@ -184,6 +187,7 @@ When converting from Dexie.js to SQL-based implementation, follow these patterns
    ```
 
 3. **Insert Operations**
+
    ```typescript
    // Before (Dexie)
    await db.table.add(item);
@@ -202,6 +206,7 @@ When converting from Dexie.js to SQL-based implementation, follow these patterns
    ```
 
 4. **Delete Operations**
+
    ```typescript
    // Before (Dexie)
    await db.table.where("id").equals(id).delete();
@@ -216,6 +221,7 @@ When converting from Dexie.js to SQL-based implementation, follow these patterns
    ```
 
 5. **Result Processing**
+
    ```typescript
    // Before (Dexie)
    const items = await db.table.toArray();
@@ -247,6 +253,7 @@ await databaseUtil.logConsoleAndDb(message, showInConsole);
 ```
 
 Key Considerations:
+
 - Always use `databaseUtil.mapQueryResultToValues()` to process SQL query results
 - Use utility methods from `db/index.ts` when available instead of direct SQL
 - Keep Dexie fallbacks wrapped in migration period checks
@@ -254,6 +261,7 @@ Key Considerations:
 - For updates/inserts/deletes, execute both SQL and Dexie operations during migration period
 
 Example Migration:
+
 ```typescript
 // Before (Dexie)
 export async function updateSettings(settings: Settings): Promise<void> {
@@ -274,6 +282,7 @@ export async function updateSettings(settings: Settings): Promise<void> {
 ```
 
 Remember to:
+
 - Create database access code to use the platform service, putting it in front of the Dexie version
 - Instead of removing Dexie-specific code, keep it.
 
@@ -330,4 +339,4 @@ it's during migration then use that result instead of the SQL code's result.
 4. **Documentation**
    - Add API documentation
    - Create migration guides
-   - Document security measures
+   - Document security measures