[FEATURE] Supported keyword and phrase search on default field

[penghuo]

Is your feature request related to a problem?
search command does not support keyword and phrase search on default field. PPL support query_string and multi_match, but it is not easy to use.

What solution would you like?
When search is the first command in query or subquery, user can use keywords or phrases to search docs from OpenSearch index. if not field specified, search against field configured in index.query. default_field, (default is all fields).

Category	Feature	OpenSearch DSL	PPL
Implied Search	keywords	"query": "wind"	wind
Implied Search	AND	"query": "wind AND rises"	wind rises
Implied Search	phrases	"query": ""web error""	"web error"

What alternatives have you considered?
n/a

Do you have any additional context?
n/a

[songkant-aws]

Looking this issue