feat: dynamic rate limiter

[s-aga-r]

Wrapper over the frappe.rate_limiter.rate_limit to dynamically apply rate limits based on Rate Limit document(s).

For 1K request:

@rate_limit(limit=10, seconds=60)

CPU times: user 1.44 s, sys: 180 ms, total: 1.62 s
Wall time: 8 s

@dynamic_rate_limit()

CPU times: user 1.51 s, sys: 203 ms, total: 1.71 s
Wall time: 8.28 s

After: frappe/frappe#31209

[s-aga-r]

ToDo:

• Composite unique key (method_path, key, ip_based and seconds)
• Create Rate Limit docs on app install.
• @rate_limit() -> @dynamic_rate_limit()