Feature: Add optimized constructors to PoolConfigs for easier performance tuning

[sonii-shivansh]

Add Performance-Optimized Constructor for Pool Configurations

Adds a new constructor to JedisPoolConfig and ConnectionPoolConfig that automatically applies the recommended performance ratio: maxTotal = maxIdle = 2 * minIdle.

The README recommends setting maxTotal = maxIdle = 2 * minIdle for best performance, but users must calculate these values manually. This enhancement makes it easier to follow best practices.

Changes

• Added JedisPoolConfig(int minIdle) constructor with performance defaults
• Added ConnectionPoolConfig(int minIdle) constructor with performance defaults
• Both constructors automatically set maxIdle and maxTotal to 2 * minIdle
• Added input validation (minIdle must be >= 1)
• Added unit tests covering all scenarios

Usage

Before:

JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(32);
config.setMaxIdle(32);
config.setMinIdle(16);

After:

JedisPoolConfig config = new JedisPoolConfig(16);
// Automatically sets: minIdle=16, maxIdle=32, maxTotal=32

Testing

• Added 6 new test cases per class
• Tests cover: default constructor, custom values, edge cases, and ratio consistency

[yangbodong22011]

@sonii-shivansh Hi, thank you for this PR. However, we cannot merge it because this configuration is suitable for most scenarios, but not all.