[Config] Document 'fiber' configuration settings

[andreyaksenov]

Product: Tarantool
Since: 3.0
Root document:

• A new fiber section in the Configuration reference.

SME: @ Totktonada

Details

Options:

• https://github.com/tarantool/tarantool/blob/f58bfc97c627f1838696697339fb3e443c05767a/src/box/lua/config/instance_config.lua#L702

Related topics:

• https://www.tarantool.io/en/doc/latest/concepts/coop_multitasking/
• https://www.tarantool.io/en/doc/latest/reference/reference_lua/fiber/

[lenkis]

Closed with 60a8acf