Add palantir-java-format as a formatter

[svix-mman]

We currently use google-java-format, and it's quite ugly.
Instead I am going with palantir-java-format, it looks much nicer.

I am keeping both, and for now I will only use palantir-java-format on the code samples

Before

var response =
        svix.getAuthentication()
                .appPortalAccess(
                        "app_1srOrx2ZWZBpBUvZwXKQmoEYga2",
                        new AppPortalAccessIn()
                                .application(
                                        new ApplicationIn()
                                                .metadata(Map.of())
                                                .name("My first application")
                                                .rateLimit(1L)
                                                .uid("unique-identifier"))
                                .capabilities(
                                        Set.of(
                                                AppPortalCapability.VIEW_BASE,
                                                AppPortalCapability.VIEW_ENDPOINT_SECRET))
                                .expiry(1L)
                                .featureFlags(Set.of())
                                .readOnly(true)
                                .sessionId("user_1FB8"));

After

var response = svix.getAuthentication()
        .appPortalAccess(
            "app_1srOrx2ZWZBpBUvZwXKQmoEYga2",
            new AppPortalAccessIn()
                .application(new ApplicationIn()
                    .metadata(Map.of())
                    .name("My first application")
                    .rateLimit(1L)
                    .uid("unique-identifier"))
                .capabilities(
                    Set.of(AppPortalCapability.VIEW_BASE, AppPortalCapability.VIEW_ENDPOINT_SECRET))
                .expiry(1L)
                .featureFlags(Set.of())
                .readOnly(true)
                .sessionId("user_1FB8"));