[Docs 15172] Add compatibility dots to mongodb-compat tables (#830)

* c table preview

* motor update

* add legend to tables

* add dot to mongodb-compat tables

* standardize |checkmark| to ✓

* remove includes statements for |checkmark|

* consistent wording in compat legend

Co-authored-by: Nathan Leniz <[email protected]>

Author: mongoKart

source/c.txt

@@ -1,7 +1,5 @@
 .. _c-language-center:
 
-.. include:: /includes/unicode-checkmark.rst
-
 ================
 MongoDB C Driver
 ================

source/csharp.txt

@@ -1,7 +1,5 @@
 .. _csharp-language-center:
 
-.. include:: /includes/unicode-checkmark.rst
-
 ==========================
 MongoDB C#/.NET Driver
 ==========================

source/cxx.txt

@@ -1,7 +1,5 @@
 .. _cxx-language-center:
 
-.. include:: /includes/unicode-checkmark.rst
-
 ==================
 MongoDB C++ Driver
 ==================

source/includes/compatibility-table-legend.rst

@@ -0,0 +1,18 @@
+Compatibility Table Legend
+++++++++++++++++++++++++++
+
+.. list-table::
+   :header-rows: 1
+   :stub-columns: 1
+   :class: compatibility
+
+   * - Icon
+     - Explanation
+
+   * - ✓
+     - All features are supported.
+   * - ⊛
+     - The Driver version will work with the MongoDB version, but not all
+       new MongoDB features are supported.
+   * - No mark
+     - The Driver version is not tested with the MongoDB version.

source/includes/language-compatibility-table-c.rst

@@ -10,6 +10,6 @@
      - C89
 
    * - All Versions
-     - |checkmark|
-     - |checkmark|
-     - |checkmark|
+     - ✓
+     - ✓
+     - ✓