Update documentation on intraRules, search example

[ascendedguard]

Updated the docs on the few things I struggled a bit with:

• Search was missing an example, beyond the time figuring it out, I ended up having to step through the code in-depth to understand why the order was null when using outOfOrder
• intraRules wasn't documented, so I added it based on #53
• The section on intraSub, intraTrn, and intraDel, I kept finding myself having to re-search through the docs to remember what they meant, as it only said in the intraMode: 1 section.

For the search example, I didn't include it in the doc but I did test it out via Codepen: https://codepen.io/ascendedguard/pen/PoLZdBJ

[leeoniya]

thanks!

i actually want to encourage people to use the integrated search, so feel like it should be listed first, but struggle with how to explain the concepts of idxs, info, order. :thinking:

[ascendedguard]

Added some more detail to explain it some more, let me know what you think.

Forgot to mention it originally, but I left the variable declarations as let to match the rest of your docs, although they could have all been const instead. They're const in the Codepen.

[ascendedguard]

Anything you need to be able to close this out?