API Reference (#452)

* Add example documentation.

* Add api reference link to Summary.

* Add new version of documents.

* Try to fix links.

* Try to fix links 2.

* Try to fix links 3.

* Update docs.

* Remove overall data.

* Update formatting.

* Reorganize code.

* More formatting.

* More formatting 2.

* More formatting 3.

* More formatting 4.

* Example of documentation for stattest.

* Add module names.

* Fix cramer_von_mises_stattest doc.

* Add docstring to some stattest modules

* Attempt fix for links.

* Add docstrings to stattests.

* Add docstrings to metric_preset.
Add paddings for sub-items in SUMMARY.md.

* Add test presets documentations.

* Update documentation.

* Fix linter and tests.

docs/book/SUMMARY.md

@@ -46,6 +46,25 @@
 * [All tests](reference/all-tests.md)
 * [All metrics](reference/all-metrics.md)
 * [Data drift algorithm](reference/data-drift-algorithm.md)
+* [Api Reference](api-reference)
+  * [evidently.calculations](api-reference/evidently.calculations.md)
+    * [evidently.calculations.stattests](api-reference/evidently.calculations.stattests.md)
+  * [evidently.metrics](api-reference/evidently.metrics.md)
+    * [evidently.metrics.classification_performance](api-reference/evidently.metrics.classification_performance.md)
+    * [evidently.metrics.data_drift](api-reference/evidently.metrics.data_drift.md)
+    * [evidently.metrics.data_integrity](api-reference/evidently.metrics.data_integrity.md)
+    * [evidently.metrics.data_quality](api-reference/evidently.metrics.data_quality.md)
+    * [evidently.metrics.regression_performance](api-reference/evidently.metrics.regression_performance.md)
+  * [evidently.metric_preset](api-reference/evidently.metric_preset.md)
+  * [evidently.options](api-reference/evidently.options.md)
+  * [evidently.pipeline](api-reference/evidently.pipeline.md)
+  * [evidently.renderers](api-reference/evidently.renderers.md)
+  * [evidently.report](api-reference/evidently.report.md)
+  * [evidently.suite](api-reference/evidently.suite.md)
+  * [evidently.test_preset](api-reference/evidently.test_preset.md)
+  * [evidently.test_suite](api-reference/evidently.test_suite.md)
+  * [evidently.tests](api-reference/evidently.tests.md)
+  * [evidently.utils](api-reference/evidently.utils.md)
 
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