docs: change hierarchy

Created by: vikmary

docs/features/models/index.rst

-Models
-======
-
-.. toctree::
-   :glob:
-   :maxdepth: 1
-
-   BERT-based models <bert>
-   Context Question Answering <squad>
-   Classification <classifiers>
-   Morphological Tagger <morphotagger>
-   Named Entity Recognition <ner>
-   Neural Ranking <neural_ranking>
-   Slot filling <slot_filling>
-   Spelling Correction <spelling_correction>
-   TF-IDF Ranking <tfidf_ranking>
-   Popularity Ranking <popularity_ranking>
-   Knowledge Base Question answering <kbqa>
-

docs/features/skills/index.rst

-Skills
-======
-
-.. toctree::
-   :glob:
-   :maxdepth: 1
-
-   Goal-Oriented Dialogue Bot <go_bot>
-   Open-Domain Question Answering <odqa>
-   Pattern Matching <pattern_matching>
-   Sequence-To-Sequence Dialogue Bot <seq2seq_go_bot>
-   Frequently Asked Questions Answering <faq>
-   eCommerce Bot <ecommerce>
-   AIML <aiml_skill>
-   DSL <dsl_skill>
-

docs/index.rst

@@ -9,6 +9,7 @@ Welcome to DeepPavlov's documentation!
    Installation <intro/installation>
    General concepts <intro/overview>
    Configuration file <intro/configuration>
+   Models/Skills overview <features/overview>
 
 
 .. toctree::
@@ -16,13 +17,43 @@ Welcome to DeepPavlov's documentation!
    :maxdepth: 2
    :caption: Features
 
-   Overview <features/overview>
-   Models <features/models/index>
-   Skills <features/skills/index>
    Pre-trained embeddings <features/pretrained_vectors>
    AutoML <features/hypersearch>
 
 
+.. toctree::
+   :glob:
+   :maxdepth: 1
+   :caption: Models
+   
+   BERT-based models <features/models/bert>
+   Context Question Answering <features/models/squad>
+   Classification <features/models/classifiers>
+   Morphological Tagger <features/models/morphotagger>
+   Named Entity Recognition <features/models/ner>
+   Neural Ranking <features/models/neural_ranking>
+   Slot filling <features/models/slot_filling>
+   Spelling Correction <features/models/spelling_correction>
+   TF-IDF Ranking <features/models/tfidf_ranking>
+   Popularity Ranking <features/models/popularity_ranking>
+   Knowledge Base Question answering <features/models/kbqa>
+
+
+.. toctree::
+   :glob:
+   :maxdepth: 1
+   :caption: Skills
+   
+   Goal-Oriented Dialogue Bot <features/skills/go_bot>
+   Open-Domain Question Answering <features/skills/odqa>
+   Pattern Matching <features/skills/pattern_matching>
+   Sequence-To-Sequence Dialogue Bot <features/skills/seq2seq_go_bot>
+   Frequently Asked Questions Answering <features/skills/faq>
+   eCommerce Bot <features/skills/ecommerce>
+   AIML <features/skills/aiml_skill>
+   DSL <features/skills/dsl_skill>
+
+
 .. toctree::
    :glob:
    :maxdepth: 3