Simplify syncing logic

frontend/sync-client/src/errors/authentication-error.ts

@@ -0,0 +1,6 @@
+export class AuthenticationError extends Error {
+    public constructor(message: string) {
+        super(message);
+        this.name = "AuthenticationError";
+    }
+}

frontend/sync-client/src/errors/file-not-found-error.ts

@@ -0,0 +1,9 @@
+export class FileNotFoundError extends Error {
+    public constructor(
+        message: string,
+        public readonly filePath: string
+    ) {
+        super(message);
+        this.name = "FileNotFoundError";
+    }
+}

frontend/sync-client/src/errors/server-version-mismatch-error.ts

@@ -0,0 +1,6 @@
+export class ServerVersionMismatchError extends Error {
+    public constructor(message: string) {
+        super(message);
+        this.name = "ServerVersionMismatchError";
+    }
+}

frontend/sync-client/src/errors/sync-reset-error.ts

@@ -0,0 +1,6 @@
+export class SyncResetError extends Error {
+    public constructor() {
+        super("SyncClient has been reset, cleaning up");
+        this.name = "SyncResetError";
+    }
+}