ACacheProvider Abstract Class

The foundational abstract system mapping caching functions universally shared by Client-Side and Server-Side instances.

Inherited directly by singletons like Cookie Cache Provider and strictly requires explicit override integration methods managing standard caching lifecycles automatically mapping lifetimes and `nuxtApp` environment bindings safely.

Method Signature
`abstract getKeyList(nuxtApp?: any): Array<string> \| Promise<Array<string>>`
`abstract get<T>(key: string, nuxtApp?: any): Promise<T \| null>`
`abstract set<T>(key: string, data: T, lifetime: number, nuxtApp?: any): Promise<void>`
`abstract remove(key: string, nuxtApp?: any): Promise<void>`
`abstract removeByPrefix(prefix: string, nuxtApp?: any): Promise<void>`
`abstract getRemainingTime(key: string, nuxtApp?: any): Promise<number \| null>`
`abstract cleanupExpired(): Promise<void>`