chore: update gitignore for SQLite, VeriSimDB, and build artifacts

Add patterns for SQLite database files, VeriSimDB local data,
shared library outputs (.so/.dylib), and Zig global cache directories.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.gitignore

@@ -116,3 +116,19 @@ v.mod.lock
 
 # Hypatia scanner logs
 .hypatia/
+
+# SQLite database files (created during testing/use)
+*.sqlite
+*.sqlite3
+*.db
+
+# VeriSimDB local data
+.verisimdb/
+
+# Shared library build outputs (cartridge .so files)
+*.so
+*.dylib
+
+# Zig global cache
+.zig-cache/
+zig-out/