(assertions): Match.greaterThan() and Match.lessThan()

### Description

Looking for a suite of Matchers on numbers specifically.

### Use Case

It would be great to be able to do something like this:

```ts
const template = Template.fromStack(stack).resourceCountIs('Foo::Bar', Match.greaterThan(0));
```

### Proposed Solution

Something like: `Match.greaterThan(number: number)` and `Match.lessThan(number: number)`.
For now, the use case is only really for `Template.fromStack().resourceCountIs()`, I think.

### Other information

_No response_

### Acknowledge

- [X] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

Start by tracing the assertions Match API and Template.fromStack().resourceCountIs(), since the issue identifies those entry points. Check how existing matchers are tested, then add numeric greater-than and less-than matcher coverage and confirm the resourceCountIs() use case works as proposed.

Written by the indexing model from the issue text.