feat: implement deepEqual utility for comprehensive value comparison

Adds a new utility function `deepEqual` that performs deep comparisons of various data types including primitives, objects, arrays, dates, RegExp, Sets, and Maps.

Includes extensive test coverage to ensure accuracy across different scenarios.

Updates README with usage examples and adds a new test file for `deepEqual`.

Also, introduces VSCode settings for improved development experience.

Author: sillvva

.vscode/settings.json

@@ -0,0 +1,14 @@
+{
+	"editor.formatOnSave": true,
+	"editor.formatOnPaste": true,
+	"explorer.fileNesting.patterns": {
+		"svelte.config.js": "*.config.ts, .zshrc",
+		"+page.svelte": "*page.remote.ts, +page.server.ts"
+	},
+	"editor.codeActionsOnSave": {
+		"source.fixAll": "explicit",
+		"source.fixAll.sortJSON": "never",
+		"source.organizeImports": "explicit",
+		"source.sortImports": "explicit"
+	},
+}

README.md

@@ -49,6 +49,21 @@ debouncedSearch.call("hello").then((result) => {
 });
 ```
 
+### deepEqual
+
+```typescript
+import { deepEqual } from "@sillvva/utils";
+
+// Deep compare of primitives, arrays, objects, maps, sets, dates, and regexps:
+console.log(deepEqual({ a: 1, b: [2, 3] }, { b: [2, 3], a: 1 })); // true
+console.log(deepEqual([1, 2, 3], [1, 2, 3])); // true
+console.log(deepEqual(new Set([1, 2]), new Set([2, 1]))); // true
+console.log(deepEqual(new Map([["x", 1]]), new Map([["x", 1]]))); // true
+
+// Not equal when structure or values differ:
+console.log(deepEqual({ foo: 1 }, { foo: 2 })); // false
+```
+
 ### isDefined
 
 ```typescript