Add a full analyzer example

[lyrixx]

Idea:

'settings' => [
                    'analysis' => [
                        'analyzer' => [
                            'app_ngram_analyzer' => [
                                'tokenizer' => 'app_ngram_tokenizer',
                                'filters' => [
                                    'lowercase',
                                    'asciifolding',
                                ],
                            ],
                        ],
                        'tokenizer' => [
                            'app_ngram_tokenizer' => [
                                'type' => 'ngram',
                                'min_gram' => 3,
                                'max_gram' => 10,
                                'token_chars' => [
                                    'letter',
                                    'digit',
                                ],
                            ],
                        ],
                    ],
                ],