🔒 Security Fix: Remove insecure 'Ignore SSL Errors' option

[Aatricks]

This PR addresses a critical security vulnerability by removing the "Ignore SSL Errors" feature.
Previously, the app allowed users to disable SSL certificate validation, which could be exploited to intercept secure traffic.

Changes:

1. NetworkModule.kt: Removed the insecure TrustManager and HostnameVerifier logic. The OkHttpClient now uses the system's default secure configuration.
2. PreferencesManager.kt: Removed the ignoreSslErrors property and storage key.
3. BaseJsoupSource.kt: Removed the logic that created an insecure SSLContext based on the preference.
4. UI Removal: Removed the "Settings" dialog and switch from the Library drawer (LibraryDrawerContent.kt) and the corresponding state in LibraryViewModel.kt.
5. ReaderScreen.kt: Updated CloudflareDialog to rely on standard WebView SSL handling (which blocks invalid certs by default).
6. Testing: Added LibraryViewModelTest.kt to ensure the ViewModel remains stable after removing the dependency. Validated with existing unit tests.

Risk Assessment:

• Risk: High (Man-in-the-Middle attacks) if the feature was enabled.
• Fix: Complete removal of the unsafe functionality.
• Impact: Users on networks with captive portals or invalid certificates will no longer be able to bypass the error within the app, which is the intended secure behavior.

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PR created automatically by Jules for task 860067918690827876 started by @Aatricks

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