Spring Security Support custom filter in Server Kotlin DSL

We should add support for adding a custom filter in the Server Kotlin DSL. Similar to ServerHttpSecurity, we should have 3 ways to add a filter, addFilterAt, addFilterBefore and addFilterAfter.

The configuration should look like this

@Bean
open fun springWebFilterChain(http: ServerHttpSecurity): SecurityWebFilterChain {
    return http {
        addFilterAfter(TestWebFilter(), SecurityWebFiltersOrder.SECURITY_CONTEXT_SERVER_WEB_EXCHANGE)
    }
}

Comment From: evgeniycheban

I can take this.

Comment From: eleftherias

Thanks @evgeniycheban! The issue is yours.