Add logging functionality and Maven publishing setup

Added Logger class with various log levels to `commonMain`. Integrated `maven-publish` and `signing` plugins in `build.gradle.kts` to facilitate publishing artifacts to the Maven repository with proper credentials and metadata. Removed `gradle.properties` and updated `.gitignore` accordingly.

build.gradle.kts

@@ -4,6 +4,7 @@ plugins {
     kotlin("multiplatform") version "2.0.21"
     `maven-publish`
     signing
+    id("org.jetbrains.dokka") version "1.5.31"
 }
 
 group = "nl.astraeus"
@@ -23,6 +24,10 @@ kotlin {
     }
 }
 
+val javadocJar by tasks.registering(Jar::class) {
+    archiveClassifier.set("javadoc")
+}
+
 publishing {
     repositories {
         maven {