feature #786 [TwigComponent] Change component naming standard + optional name (weaverryan)

This PR was squashed before being merged into the 2.x branch.

Discussion
----------

[TwigComponent] Change component naming standard + optional name

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Tickets       | None
| License       | MIT

Changes the naming convention of components to upper camel case + makes the `name` argument optional (defaults to class name). Components now look like:

```php
    #[AsTwigComponent]
    class Alert
    {
        public string $type = 'success';
        public string $message;
    }
```

The template is `templates/components/Alert.html.twig` and you render with `{{ component('Alert') }}`. This removes the need for the user to invent & keep track of an arbitrary name, but they *can* still pass a name to `AsTwigComponent`. No BC break on this.

Relates to a conversation on #771 (comment)

TODO:

* [ ] Update MakerBundle to follow this convention

Commits
-------

8dc9a7d [TwigComponent] Change component naming standard + optional name

Author: weaverryan

src/LiveComponent/doc/index.rst

@@ -22,7 +22,7 @@
 final class AsLiveComponent extends AsTwigComponent
 {
     public function __construct(
-        string $name,
+        ?string $name = null,
         ?string $template = null,
         private ?string $defaultAction = null,
         bool $exposePublicProps = true,

src/LiveComponent/src/Attribute/AsLiveComponent.php

@@ -4,6 +4,8 @@
 
 -   `true` attribute values now render just the attribute name, `false` excludes it entirely.
 
+-   The first argument to `AsTwigComponent` is now optional and defaults to the class name.
+
 ## 2.7.0
 
 -   `PreMount` and `PostMount` hooks can now return nothing.