Misc improvements

[ohltyler]

Description

Small PR with few improvements:

• always show the query in the search tab. if updated from the default configured query (if in search context), show a button to revert back
• add loading state to the search button to prevent overloading, and for visibility if searches take a long time (e.g., RAG flows)
• makes 'OverrideQueryModal' consistent with other modals by persisting temporary form s.t. query is only updated if users explicitly save
• adds check for JSONArray form types to validate on byte size; this prevents hitting OSD REST request limits when executing APIs, such as ingest. For example, adding byte64 encodings in ingest may not exceed the already-defined doc count of 1000, but may exceed the byte count, and thus fail at runtime. This prevents even setting the docs field to something that would later fail, and provides detailed information in the error message.
• tunes placeholder value for output map transforms where "No transformation" is selected
• makes default input/output entries consistent when adding new, by setting default transform types to "Field" and "No transformation", respectively
• add a JSONPath examples table component. Not used yet, as UX is still being finalized for this part. Will be accessible in some tooltips / extra information somewhere.

Demo video showing search changes:

screen-capture.12.webm

Issues Resolved

N/A

Check List

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