Implement custom logger to replace scribe.js.

* scribe.js is unmaintained and adds unnecessary complexity.

server/types/logger.ts

@@ -1,4 +1,20 @@
+export type LogLevel = 'debug' | 'info' | 'warn' | 'error' | 'profile';
+export const LogLevels: LogLevel[] = ['debug', 'info', 'warn', 'error', 'profile'];
+
+export function isLogLevel(arg: any): arg is LogLevel {
+    if (typeof arg !== "string") {
+        return false;
+    }
+    for (const level of LogLevels) {
+        if (level === arg) {
+            return true;
+        }
+    }
+    return false;
+}
+
 export interface TaggedLogger {
+    log(level: LogLevel, ...args: any[]): void;
     debug(...args: any[]): void;
     info(...args: any[]): void;
     warn(...args: any[]): void;
@@ -7,6 +23,5 @@ export interface TaggedLogger {
 }
 
 export interface Logger {
-    init(): void;
     tag(...tags: string[]): TaggedLogger;
 }