Improved the Native Search Algorithm

[ynnelson]

You can now search tags in addition to H2 and H3 titles as well as the search can now take in multiple words separated by a space.

Summary

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Docs
• Build-related changes
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I simply improved the suggestions () method in the SearchBox component to now include tags if they exist in the frontmatter, this is combined with the existing behavior of searching through headers. Also, the other improvement is that you can now do a search based on multiple keywords as opposed to only one previously.

This is a very minor adjustment which I think will satisfy a lot of the issues with the native search and allows the user to make pages show up in the search based on the tags assigned to it.

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Does this PR introduce a breaking change? (check one)

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• No

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The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)

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If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature
• Related documents have been updated
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