Fixes #6752

Adds Deno.core.jsonOpSync and Deno.core.jsonOpAsync

Closes: #7020

Before this patch the TOML parser would incorrect treat the string
"base64data0xdamaged" in a declaration as a hex number because the
corresponding check triggers even when the "0x" is inside a double
quoted string literal as long as it is followed by at least one hex
character.

Removes unnecessary wrappers around ResourceTable and CoreIsolate.

Importantly: now uses the resource table inside CoreIsolateState rather than a different one.

Removes derive_deref dependency

This ensures that all spaces are set to be "+" in the string rather than
just the first and brings deno into line with how browsers handle spaces
in URLSearchParams, see #7001.

Currently this blocks using the ::with_heap_limits constructor of CoreIsolate, because you cannot access the struct.