feat(utils): Add generic structured type guards.

[grypez]

Adds some abstract type guards to @ocap/utils.

• isPrimitive checks that a value is a string, number, bigint, boolean, symbol, null or undefined
• isTypedArray checks that a value is an array such that every element passes the supplied type guard
• isTypedObject checks that a value is an object such that every value passes the supplied type guard

The container type guards pass trivially on empty arrays and objects with no values.

[sirtimid]

Nice one!