fix: sort table list at app layer for all databases

[datlechin]

Summary

• Sort table list alphabetically in LiveTableFetcher using localizedCaseInsensitiveCompare
• This covers all database types uniformly (MySQL, PostgreSQL, SQLite, MongoDB, BigQuery, DynamoDB, ClickHouse, Redis, Oracle, DuckDB, Cassandra, Etcd, CloudflareD1, MSSQL)
• Supersedes fix: Sort table list by name in MongoDb, BigQuery, DynamoDB, MySql. #554 which added per-plugin sorting in only 4 plugins

Single-line change in SidebarViewModel.swift — sorts driver.fetchTables() results before caching.

Test plan

• Connect to any database → verify sidebar table list is alphabetically sorted
• Test with mixed case names (e.g., Users, accounts, Orders) → verify case-insensitive sorting