[FEAT] Improved substring matching

[NeonDaniel]

Objective

Currently, a title is matched in the search phrase, so a title "He" will match "The" in an utterance. This should be updated to only search words, not substrings.

Initial Implementation Requirements

• Update search logic to search on boundaries
• Implement unit tests

Other Considerations

• Does this realistically only apply to one-word titles?
• Can/should we boost or lower confidence based on percent of substring matched?

[NeonDaniel]

Relating to confidence based on substrings matched, confidence could be reduced with track/album/artist length since a longer string must have matched more of the utterance

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