Proposed Changes

• Fix ztls handshake timeout logic by running Handshake() in a goroutine and selecting on context timeout.
• Close TLS connection on timeout to unblock stuck handshakes.
• Replace context.TODO() with timeout context in ztls cipher enumeration.
• Use HandshakeContext(ctx) with timeout in ctls cipher enumeration instead of bare Handshake().

Why

• Issue #819 reports indefinite hangs for some hosts during long runs.
• Existing ztls timeout path could still block because Handshake() was evaluated synchronously in the select send expression.
• Cipher-enum paths had missing timeout contexts.

How to verify

1. Run package compile smoke tests:
   • go test ./pkg/tlsx/ztls ./pkg/tlsx/tls -run TestDoesNotExist
2. Reproduce with unresponsive hosts / slow TLS endpoints and observe scanner no longer hangs indefinitely in handshake/cipher enum paths.

Proof

• Compile/test smoke:
  • ok github.com/projectdiscovery/tlsx/pkg/tlsx/ztls
  • ok github.com/projectdiscovery/tlsx/pkg/tlsx/tls

Notes

• Full upstream tests currently fail in this environment on pre-existing TLS test behavior unrelated to these changes.

/claim #819