Update SourceGear.lib dependency to 3.50.4.2

• Change package ID of SQLitePCLRaw.lib.e_sqlite3 to SourceGear.sqlite3
• Minor changes to readmes and such

v3 release notes

• Update sqlite3 and sqlite3mc builds to SQLite 3.49.1

• Wasm assets for .NET 9
• Update sqlite3 and sqlite3mc builds to SQLite 3.46.1
• Update Android builds to add support for 16kb page size

• Update sqlite3 and sqlite3mc to SQLite 3.46.0
• Add support for risvc64 (thanks @kasperk81)

Update e_sqlite3 and e_sqlite3mc builds to SQLite 3.45.1

• New packages with support for SQLite3 Multiple Ciphers, thanks to @bricelam and @utelle
• Fix for problems with VSTO, thanks to @farzonl
• Fix for perf-related warning CA1859, thanks to @bricelam
• Fix for incorrect handling of empty string with Span APIs, thanks to @nil4
• Add sqlite3_serialize/deserialize, thanks to @Trinitek and @garthmz
• Add support for linux-musl-s390x, thanks to @uweigand
• Fix problem with calling conventions on x86, thanks to @filipnavara

The versions of the underlying SQLite code for the builds in this release are:

• 3.44.0 for e_sqlite3
• 3.44.0 for e_sqlite3mc
• 3.39.2 for e_sqlcipher

• Wasm assets and RID tweak for compatibility with upcoming .NET 8 release

• Fix support for iOS simulator on arm64 Macs
• Update e_sqlite3 builds to 3.41.2
• (e_sqlcipher builds remain at 3.39.2)