Add guidance for connection Pool

[pierrelambert]

It appears that it is not that direct/trivial to override default pool config from spring data.
Using spring.data.redis.jedis.pool.* properties is not overriding default values.

One way to solve this was to use a JedisClientConfigurationBuilderCustomizer

as described here: spring-projects/spring-boot#33814

It would be nice to have some documentation/material on the alternatives / way to do such using redis-om-spring.

[bsbodden]

@maorohana-redis can you take on this?

[pierrelambert]

any update ?

[bsbodden]

The documentation has been successfully updated to address issue #217. The comprehensive guide now includes:

1. Basic pool configuration using Spring Boot properties
2. Advanced Java-based configuration with custom JedisConnectionFactory bean
3. JedisClientConfigurationBuilderCustomizer approach (specifically requested in the issue)
4. Pool monitoring examples to track connection usage
5. Common configuration scenarios for different application needs
6. All necessary imports for the code examples