refactor: Fix ESLint + Add comments

src/linter/yaml/UI5YamlLinter.ts

@@ -25,9 +25,18 @@ const deprecatedLibraries: string[] = [ // TODO: outsource as constant (for reus
 	"sap.zen.dsh",
 ];
 
+// file content schema of 'UI5Yaml' with only relevant properties
+interface UI5YamlContentSchema { // extend for further detections
+	framework: {
+		libraries: {
+			name: string;
+		}[];
+	};
+}
+
 export default class UI5YamlLinter {
 	#content = "";
-	#fromYamlContent: DataWithPosition = "";
+	#fromYamlContent: DataWithPosition;
 	#path = "";
 	#messages: LintMessage[] = [];
 	#coverageInfo: CoverageInfo[] = [];
@@ -39,9 +48,10 @@ export default class UI5YamlLinter {
 
 	// eslint-disable-next-line @typescript-eslint/require-await
 	async getReport(): Promise<LintResult> {
-		const source: any = this.#parseUI5Yaml(this.#content);
+		const source: UI5YamlContentSchema = this.#parseUI5Yaml(this.#content);
 		this.#analyzeUI5Yaml(source);
 
+		// Calculate error counts
 		let errorCount = 0;
 		let warningCount = 0;
 		let fatalErrorCount = 0;
@@ -66,15 +76,17 @@ export default class UI5YamlLinter {
 		};
 	}
 
-	#parseUI5Yaml(fileContent: string) {
+	#parseUI5Yaml(fileContent: string): UI5YamlContentSchema {
+		// Create JS object from YAML content with position information
 		this.#fromYamlContent = fromYaml(fileContent);
-		return yaml.load(fileContent);
+		// Convert YAML content to JS object
+		return yaml.load(fileContent) as UI5YamlContentSchema;
 	}
 
-	#analyzeUI5Yaml(ui5YamlObject: {framework: {libraries: {name: any}[]}}) { // maybe add ui5.yaml specific schema (https://sap.github.io/ui5-tooling/schema/ui5.yaml.json)?
+	#analyzeUI5Yaml(ui5YamlObject: UI5YamlContentSchema) {
 		// Check for deprecated libraries
 		if (ui5YamlObject?.framework?.libraries?.length) {
-			ui5YamlObject.framework.libraries.forEach((lib: {name: any}, index: number) => {
+			ui5YamlObject.framework.libraries.forEach((lib, index: number) => {
 				if (deprecatedLibraries.includes(lib.name)) {
 					const positionInfo = getPosition(this.#fromYamlContent.framework.libraries[index]);
 					this.#messages.push({