Add advanced writing records documentation

Author: twiggler

docs/source/advanced/index.rst

@@ -11,3 +11,4 @@ Advanced
     /advanced/filesystems
     /advanced/plugins
     /advanced/record_descriptors
+    /advanced/records

docs/source/advanced/records.rst

@@ -0,0 +1,64 @@
+Working with Records
+====================
+
+This section describes how to work with records. Records are the fundamental data structure in ``dissect`` and are
+used to describe forensic evidence and artefacts in a structured way. They can be read from and written to various
+sources and formats.
+
+Writing Records with rdump
+--------------------------
+
+The easiest way to write records is by using the :doc:`/tools/rdump` tool. It allows you to read records from any
+source, filter them, and write them to a new destination.
+
+The output format is determined by the ``-w/--writer`` argument. You can specify a filename, and ``rdump`` will
+automatically detect the desired output format and compression based on the file extension.
+
+For example, to write records to a gzip-compressed file, you can use:
+
+.. code-block:: console
+
+    $ rdump <source> -w output.rec.gz
+
+Writing Records with Python
+---------------------------
+
+For more advanced use-cases, you can use the :class:`flow.record.RecordWriter` class in your own Python scripts. This
+gives you full control over how and where records are written.
+
+The ``RecordWriter`` is best used as a context manager. It takes a URI as its main argument, which specifies the
+adapter and any options to use.
+
+Here's an example of writing records to a JSON file:
+
+.. code-block:: python
+
+    from flow.record import RecordWriter, Record
+
+    records = [
+        Record(myfield="value1"),
+        Record(myfield="value2"),
+    ]
+
+    with RecordWriter("jsonfile://output.json?indent=2") as writer:
+        for record in records:
+            writer.write(record)
+
+Adapters
+--------
+
+The ``RecordWriter`` uses adapters to write to different formats. The adapter is selected based on the scheme of the
+URI passed to the ``RecordWriter``.
+
+Some common adapters include:
+
+* ``file``: The default record stream format.
+* ``csvfile``: For writing CSV files.
+* ``jsonfile``: For writing JSON or JSONL files.
+* ``line``: For writing to the console in a human-readable format.
+
+You can get a full list of available adapters by running ``rdump --list-adapters``.
+
+.. seealso::
+
+    For more information about the ``flow.record`` library, please refer to the :doc:`/projects/flow.record/index` page.