✏️ fix: markdown problems in docs

Author: grixu

docs/data.md

@@ -1,10 +1,17 @@
-## Identifier - unique identifier specified by the user, providing its key from TSchema or a function resolving it.
+# Data
 
-The `ResolveIdentifier` type is intended to specify the type of identifier in the Schema uniquely.
+`Identifier` - unique identifier specified by the user, providing its key from
+ TSchema or a function resolving it
 
-If the identifier has not been specified by the user, the DefaultIdentifier will be returned as a fallback to `string`.
+The `ResolveIdentifier` type is intended to specify the type of identifier in
+ the Schema uniquely.
 
-If specified, it must be a key in the Schema or a function generating the identifier. In the case of being a key, the returned identifier will be of the corresponding value type.
+If the identifier has not been specified by the user, the DefaultIdentifier will
+ be returned as a fallback to `string`.
+
+If specified, it must be a key in the Schema or a function generating the
+ identifier. In the case of being a key, the returned identifier will be of
+ the corresponding value type.
 
 If it is a function, the type will match the type returned from the function.
 
@@ -14,4 +21,5 @@ If it is a function, the type will match the type returned from the function.
 | `keyof Schema` | `Schema[key]`    |
 | `(data: Schema) => Foo` | `Foo`       |
 
-The UpdateEntityInput type is used in functions updating data and aims to secure against updating the identifier to ensure data integrity.
+The UpdateEntityInput type is used in functions updating data and aims to secure
+ against updating the identifier to ensure data integrity.