doc: Update TODO

TODO.md

@@ -1,6 +1,7 @@
 # TODO
 
 ## IndexableXXXQuery
+
 Create IndexableXXXQuery classes (based on Craft ElementQueries) to get rid of
 the following methods:
   - `getIndexableElementModels()`
@@ -16,3 +17,30 @@ They should have:
   - a static `find()` method that return a new instance of the XXXQuery class
     with prepopulated parameters (blacklisted sections, status, non-empty URL…)
   - `one()` & `all()` instance methods to get `IndexableElementModel` instances
+
+
+## Add the following CP settings
+
+  - `isEntryIndexingEnabled`: defaults to `true`, allows to disable the indexing
+    of entries
+  - `isAssetsIndexingEnabled`: defaults to `true`, allows to disable the
+    indexing of assets
+  - `isProductsIndexingEnabled`: defaults to `true`, allows to disable the
+    indexing of products
+  - `isDigitalProductsIndexingEnabled`: defaults to `true`, allows disabling the
+    indexation of digital products
+  - `blacklistedProductTypes`: defaults to `[]`, allows disabling indexation of
+    the product types
+  - `blacklistedDigitalProductTypes`: defaults to `[]`, allows disabling
+    indexation of the given digital product types
+
+
+## Refactor the following settings
+
+  - `blacklistedEntryTypes`: must include the handle of the section
+    (e.g. `section:entryType`) as entry type handles are only unique in a given
+    section
+  - `contentExtractorCallback`: Use an event instead
+  - `elementContentCallback`: Use an event instead
+  - `resultFormatterCallback`: Use an event instead
+  - `extraFields`: Use an event instead