INSERT multiple JSON CONTENTs at once

[gramian]

Dear All,
I would like to propose to extend the syntax of inserting JSON, ie:

INSERT INTO doc CONTENT { "name": "Jerry" };

such that it allows multiple record insertions in a single command, just like VALUES does.
This could look like:

INSERT INTO doc CONTENT { "name": "Jerry" }, { "num": 4 }, { "id": "x1" };

which would result in three records.

[tolgaulas]

I think it should honor the json array structure like ... CONTENT [{ "name": "Jerry" }, { "num": 4 }, { "id": "x1" }]

[lvca]

Ok, I like the json array format. Starting the implementation and tests.

[lvca]

Followup on #1257

[lvca]

Implemented in 23.10.1-SNAPSHOT.