Add initial minecraft-java-manager scaffold

Initial project scaffold for minecraft-java-manager. Adds package.json and package-lock.json, README update, index.js entrypoint and test.js. Introduces src modules: checker (detects Java version), installer (downloads JRE components with redirects, SHA1 validation, progress/events and concurrency), web (fetches launcher/runtime manifests and component data), systeminfo (platform key and install path resolution) and config (endpoints). Declares dependencies adm-zip and node-downloader-helper.

package.json

@@ -0,0 +1,24 @@
+{
+	"name": "minecraft-java-manager",
+	"version": "0.0.1",
+	"description": "Node module to check if java is installed and install it",
+	"repository": {
+		"type": "git",
+		"url": "https://gitea.azures.fr/azures04/minecraft-java-manager"
+	},
+	"license": "MIT",
+	"author": {
+		"name": "azures04",
+		"url": "https://gitea.azures.fr",
+		"email": "azures04@azures.fr"
+	},
+	"type": "commonjs",
+	"main": "index.js",
+	"scripts": {
+		"test": "echo \"Error: no test specified\" && exit 1"
+	},
+	"dependencies": {
+		"adm-zip": "^0.6.0",
+		"node-downloader-helper": "^2.1.11"
+	}
+}