Improve error handling when all template lines fail to expand

[coderabbitai]

When all lines fail to expand during template rendering, an exception should be thrown. If at least one line expands successfully, failed lines should be logged and ignored, allowing processing to continue.

PR: #317
Comment: #317 (comment)
Requester: @JarbasAl

Learning: In ovos_utils/dialog.py, when all lines in a template fail to expand during rendering, an exception should be thrown. If at least one line expands successfully, any failed lines should be logged, the bad lines dropped, and processing should continue since there is enough data to proceed.