[ADD] AwesomeOwl: Add playground and base components

Added the base structure for the AwesomeOwl module.
Introduced main components and sub-components (Playground, Counter, and Card).
Implemented props validation and callback handling (e.g., sum case).
This commit covers the first chapter (tasks 1 to 6) of the Web Framework section from Odoo's official documentation.

awesome_owl/static/src/card/card.js

@@ -0,0 +1,12 @@
+import { Component } from "@odoo/owl";
+
+export class Card extends Component {
+    static template = "awesome_owl.card";
+    static props = {
+        "title": {
+            type: String,
+            validate: s => s.startsWith("[Odoo]")
+        },
+        "content": String
+    }
+}

awesome_owl/static/src/card/card.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<templates xml:space="preserve">
+
+    <t t-name="awesome_owl.card">
+        <div>
+            <span>Title: <t t-out="props.title"/></span>
+            <span>Content: <t t-out="props.content"/></span>
+        </div>
+    </t>
+</templates>

awesome_owl/static/src/counter/counter.js

@@ -0,0 +1,21 @@
+import { Component, useState } from "@odoo/owl";
+
+export class Counter extends Component {
+    static template = "awesome_owl.counter";
+    static props = {
+        onChange: {
+            type: Function,
+            optional: true,
+        }
+    }
+    setup() {
+        this.state = useState({ value: 0 });
+    }
+
+    increment() {
+        this.state.value++;
+        if (this.props.onChange) {
+            this.props.onChange();
+        }
+    }
+}

awesome_owl/static/src/counter/counter.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<templates xml:space="preserve">
+
+    <t t-name="awesome_owl.counter">
+        <div>
+            <button t-on-click="increment">Increment</button>
+            <span>Counter: <t t-esc="state.value"/></span>
+        </div>
+    </t>
+</templates>

awesome_owl/static/src/playground.js

@@ -1,7 +1,20 @@
 /** @odoo-module **/
 
-import { Component } from "@odoo/owl";
+import { Component, markup, useState } from "@odoo/owl";
+import { Card } from "./card/card";
+import { Counter } from "./counter/counter";
 
 export class Playground extends Component {
     static template = "awesome_owl.playground";
+    static components = { Counter, Card };
+
+    setup() {
+        this.title = "[Odoo] New version here!!!";
+        this.content = markup("<div><span>19.0</span></div>");
+        this.sum = useState({value: 0});
+    }
+
+    incrementSum() {
+        this.sum.value++;
+    }
 }

awesome_owl/static/src/playground.xml

@@ -4,7 +4,13 @@
     <t t-name="awesome_owl.playground">
         <div class="p-3">
             hello world
+            <Counter onChange.bind="incrementSum"></Counter>
+            <br/>
+            <Counter onChange.bind="incrementSum"></Counter>
+        </div>
+        <span>Total counter sum: <t t-out="sum.value"></t></span>
+        <div>
+            <Card title="title" content="content"/>
         </div>
     </t>
-
 </templates>