doc(feat): add README

README.md

@@ -0,0 +1,33 @@
+# MIME-type parser and abstraction library for PHP
+
+Resolve MIME-types from file extensions and vice versa by passing a URL to an RFC 4288-compatible source to this library.
+
+```php
+use vlw\MimeTypes\MimeTypes;
+
+$mime = new MimeTypes("https://raw.githubusercontent.com/apache/httpd/refs/heads/trunk/docs/conf/mime.types");
+
+// From string
+$mime->get_ext_from_type("image/webp"); // "webp"
+$mime->get_type_from_ext("webp"); // "image/webp"
+
+// From pathname
+$mime->get_ext_from_file("path/to/file.webp") // "webp"
+$mime->get_type_from_file("path/to/file.webp) // "image/webp"
+```
+
+# Installation
+
+```sh
+composer require vlw/mime-types
+```
+
+# Use
+
+```php
+use vlw\MimeTypes\MimeTypes;
+
+$mime = new MimeTypes(string $url);
+```
+
+Defaults to [Apache's `mime.types` file from GitHub](https://raw.githubusercontent.com/apache/httpd/refs/heads/trunk/docs/conf/mime.types) if no value is provided to `$url`