(DOCSP-34693): Add lifecycle diagrams for writes (#5519)

* (DOCSP-34693): Add lifecycle diagrams for writes

* add width option

* change width

* change figure to image

* add diagram for secondary

* fix file path

* wording

* typo

* wording

* remove cursor from secondary diagram

* move note location on secondary diagram

* standardize font

* tweak primary diagram for consistency

* minimalism

* change diagrams for 7.0 behavior

* fix build error

* size

* update primary diagram

* update diagram

Author: jeff-allen-mongo

source/images/write-lifecycle/write-lifecycle-primary-7-0.png

@@ -512,3 +512,9 @@ Write Concern Contrasted with Commit Quorum
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. include:: /includes/indexes/commit-quorum-vs-write-concern.rst
+
+.. toctree::
+   :titlesonly:
+   :hidden:
+
+   /reference/write-concern/write-lifecycle

source/images/write-lifecycle/write-lifecycle-secondary-7-0.png

@@ -0,0 +1,30 @@
+.. _write-lifecycle-diagrams:
+
+========================
+Write Lifecycle Diagrams
+========================
+
+.. contents:: On this page
+   :local:
+   :backlinks: none
+   :depth: 1
+   :class: singlecol
+
+These diagrams show the lifecycle of a :dbcommand:`findAndModify`
+operation on primary and secondary replica set members. The lifecycles
+of other write commands are similar, but the number of resulting oplog
+entries may vary.
+
+Write Lifecycle on a Primary Member
+-----------------------------------
+
+.. image:: /images/write-lifecycle/write-lifecycle-primary-7-0.png
+   :alt: Lifecycle of a findAndModify command on a primary member
+   :width: 300px
+
+Write Lifecycle on a Secondary Member
+-------------------------------------
+
+.. image:: /images/write-lifecycle/write-lifecycle-secondary-7-0.png
+   :alt: Lifecycle of a findAndModify command on a secondary member
+   :width: 300px