[explorer + ts-sdk] Search input string type checks

[stella3d]

This adds some basic string type checks to the TypeScript SDK, for object ID, address, and transaction digest.

We use these new string type checks in the explorer in order to:

• cut down on the amount of bad requests being sent to the RPC node (see [rpc] Better reporting / handling of bad queries #2020 )
• give better error, faster when the query is malformed (we can refine this further later)

[stella3d]

this should close #2022

[666lcz]

Thanks for improving the search! In addition to the inline comments, could you also add a unit test for the added SDK util functions?

[apburnie]

Nice to see improved error handling. We need the 2 error pages to be rationalised to 1. Could we also have some tests set up to ensure the checks on search terms behave as intended?

[stella3d]

i'm unifying the error pages right now, let's not merge yet.

[stella3d]

screenshots from the build i'm about to push

search transactions category with a bad query:

search objects category with a bad query:

search addresses category with a bad query:

search all with a bad query:

[stella3d]

I want to get rid of this but it requires overhauling the test data, i think this works fine for now

[apburnie]

Yes - we can revisit this when we move from static JSON to that delivered by the API.

[apburnie]

Excellent - this is ready for merge. It's also great to see Search Disambiguation between transactions and objects/addresses implemented at the search query level.