docs: add Quota specification page

[gulducat]

main new page: https://nomad-piwjwg6gg-hashicorp.vercel.app/nomad/docs/other-specifications/quota

other affected pages:

• docs/enterprise
• docs/job-specification/resources
• docs/other-specifications

---

relates to hashicorp/tutorials#2263

closes #23258

[tgross]

I've left a suggestion on expanding the explanations to make this a better reference doc (vs the tutorial).

A non-blocking syntax suggestion: you've hard-wrapped at a very narrow width instead of the traditional 80, and when you combine that with using inline lines we get some lines with one or two words. If you use footer links and wrap at something with a little more breathing room it might make it a little easier to read the source.

[tgross]

Should we add a link to this page from the quota apply and/or quota init docs?

[tgross]

I'd probably break the leading paragraph into 2 sentences. The "as well" doesn't seem to follow from the "are associated with". We don't really have good reference docs on what the heck quotas do (just the tutorials), so this seems like a good place for it.

Suggested change

	These are associated with the parameters on a task
	[`resources`](/nomad/docs/job-specification/resources)
	block in a job specification, and the
	[CPU concepts](/nomad/docs/concepts/cpu)
	page has more information regarding CPU resources as well.
	- `cores` `(int: <optional>)` - Number of CPU cores
	- `cpu` `(int: <optional>)` - Amount of CPU in MHz
	- `memory` `(int: <optional>)` - Amount of memory in MB
	- `memory_max` `(int: <optional>)` - Max amount of memory in MB
	- `device` <code>([Device](#device-parameters): nil)</code>
	Region limits define the limits on cumulative task `resources` blocks for allocations
	in the namespace and region the quota is applied to.
	- `cores` `(int: <optional>)` - The limit on total number of CPU cores from all
	`resources.cores` in the namespace. The [CPU concepts](/nomad/docs/concepts/cpu)
	documentation has more details on CPU resources.
	- `cpu` `(int: <optional>)` - The limit on total amount of CPU from all `resources.cpu`
	in the namespace.
	- `memory` `(int: <optional>)` - The limit on total mount of memory in MB from all
	`resources.memory` in the namespace.
	- `memory_max` `(int: <optional>)` - The limit on total mount of hard memory limits in MB
	from all `resources.memory_max` in the namespace.
	- `device` <code>([Device](#device-parameters): nil)</code>

The resources.memory_max bit here feels like it could use more precision but I'm not super familiar with how that's implemented either.