DOCSP-50747: agg tutorial link (#138)

* DOCSP-50747: agg tutorial link

* wip

Author: rustagir

snooty.toml

@@ -30,3 +30,4 @@ string-data-type = "``string``"
 int-data-type = "``int``"
 stable-api = "Stable API"
 mdb-server = "MongoDB Server"
+language = "C++"

source/aggregation.txt

@@ -37,14 +37,23 @@ part of the Query API, is modeled on the concept of data processing
 pipelines. Documents enter a pipeline that contains one or more stages,
 and this pipeline transforms the documents into an aggregated result.
 
+.. sharedinclude:: dbx/agg-tutorials-manual-tip.rst
+
+   .. replacement:: language
+
+      :guilabel:`{+language+}11`
+
+Analogy
+~~~~~~~
+
 An aggregation operation is similar to a car factory. A car factory has
 an assembly line, which contains assembly stations with specialized
 tools to do specific jobs, like drills and welders. Raw parts enter the
 factory, and then the assembly line transforms and assembles them into a
 finished product.
 
-The **aggregation pipeline** is the assembly line, **aggregation stages** are the
-assembly stations, and **operator expressions** are the
+The **aggregation pipeline** is the assembly line, **aggregation
+stages** are the assembly stations, and **operator expressions** are the
 specialized tools.
 
 Aggregation Versus Find Operations