Add notification setting to hide hellthreads

Changelog-Added: Add notification setting to hide hellthreads
Closes: https://github.com/damus-io/damus/issues/2943
Signed-off-by: Terry Yiu <git@tyiu.xyz>

damusTests/LargeEventTests.swift

@@ -0,0 +1,50 @@
+//
+//  LargeEventTests.swift
+//  damusTests
+//
+//  Created by William Casarin on 2023-08-05.
+//
+
+import XCTest
+@testable import damus
+
+final class LargeEventTests: XCTestCase {
+
+    func testLongPost() throws {
+        let json = "[\"EVENT\",\"subid\",\(test_failing_nostr_report)]"
+        let resp = NostrResponse.owned_from_json(json: json)
+
+        XCTAssertNotNil(resp)
+        guard let resp,
+              case .event(let subid, let ev) = resp
+        else {
+            XCTAssertFalse(true)
+            return
+        }
+
+        XCTAssertEqual(subid, "subid")
+        XCTAssertTrue(ev.should_show_event)
+        XCTAssertTrue(!ev.too_big)
+        XCTAssertTrue(should_show_event(state: test_damus_state, ev: ev))
+        XCTAssertTrue(validate_event(ev: ev) == .ok)
+    }
+
+    func testIsHellthread() throws {
+        let json = "[\"EVENT\",\"subid\",\(test_failing_nostr_report)]"
+        let resp = NostrResponse.owned_from_json(json: json)
+
+        XCTAssertNotNil(resp)
+        guard let resp,
+              case .event(let subid, let ev) = resp
+        else {
+            XCTAssertFalse(true)
+            return
+        }
+
+        XCTAssertEqual(subid, "subid")
+        XCTAssertTrue(ev.should_show_event)
+        XCTAssertTrue(ev.is_hellthread)
+        XCTAssertTrue(validate_event(ev: ev) == .ok)
+    }
+
+}