feat: add cache layer & modify kv and list command with cache

[hahahashen]

对pikiwidb添加cache层，主要有以下几个步骤： 1、引入rediscache依赖 2、封装rediscache接口 3、封装PCache类用以管理rediscache 4、封装PCacheLoadThread类用以cache miss时加载key到cache 5、将cache处理添加进原来的命令处理流程，以及DB初始化过程中（cache初始化成功与否不影响DB初始化） 6、新增cache配置项，并进行读取 7、命令改造，当前PR已经改造了 kv & list

[coderabbitai[bot]]

[!NOTE] Currently processing new changes in this PR. This may take a few minutes, please wait...

Commits

Files that changed from the base of the PR and between b195f25d7195920403280fb27777798199a553bd and 37b58b85720bd631274831c2205d3a47ba46c03a.

Files selected for processing (31)

* CMakeLists.txt (2 hunks) * cmake/jemalloc.cmake (1 hunks) * cmake/rediscache.cmake (1 hunks) * etc/conf/pikiwidb.conf (1 hunks) * src/CMakeLists.txt (3 hunks) * src/base_cmd.cc (1 hunks) * src/base_cmd.h (2 hunks) * src/cache/CMakeLists.txt (1 hunks) * src/cache/config.h (1 hunks) * src/cache/list.cc (1 hunks) * src/cache/redisCache.cc (1 hunks) * src/cache/redisCache.h (1 hunks) * src/cache/string.cc (1 hunks) * src/cache_define.h (1 hunks) * src/client.h (2 hunks) * src/cmd_keys.cc (8 hunks) * src/cmd_keys.h (10 hunks) * src/cmd_kv.cc (20 hunks) * src/cmd_kv.h (16 hunks) * src/cmd_list.cc (11 hunks) * src/cmd_list.h (13 hunks) * src/config.cc (2 hunks) * src/config.h (1 hunks) * src/db.cc (1 hunks) * src/db.h (3 hunks) * src/pcache.cc (1 hunks) * src/pcache.h (1 hunks) * src/pcache_load_thread.cc (1 hunks) * src/pcache_load_thread.h (1 hunks) * src/thread.cc (1 hunks) * src/thread.h (1 hunks)

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