(DOCSP-41633): Consolidation: Incorporate Counter and Progress Notifications updates (#3331)

## Pull Request Info - SDK Docs Consolidation

Jira ticket: https://jira.mongodb.org/browse/DOCSP-41633

Re: counters, the only info I'm pulling in here is for the "Create"
page. The rest of the Counter info will be incorporated as we work on
other PRs in the consolidation project (for defining a counter property
and updating a counter property).

*Staged Page*

- [Create Property
Types/Counters](https://preview-mongodbdacharyc.gatsbyjs.io/realm/incorporate-counters/sdk/crud/create/create-property-types/#create-a-counter-property):
Add info for JavaScript and TypeScript about creating objects with the
new JS counter type.
- [Manage Sync
Sessions](https://preview-mongodbdacharyc.gatsbyjs.io/realm/incorporate-counters/sdk/sync/manage-sync-sessions/#check-upload-and-download-progress):
Add the .NET example for the new estimate-based progress notifications.

*Page Source*

Add links to every SDK's pages where you got the SDK-specific
information:

- [.NET: Monitor Sync
Progress](https://www.mongodb.com/docs/atlas/device-sdks/sdk/dotnet/sync/sync-progress/#monitor-sync-progress)
- [Node.js:
Counters](https://www.mongodb.com/docs/atlas/device-sdks/sdk/node/model-data/data-types/counters/)

### PR Author Checklist

Before requesting a review for your PR, please check these items:

- [x] Open the PR against the `feature-consolidated-sdk-docs` branch
instead of `master`

### Reviewer Checklist

As a reviewer, please check these items:

- [ ] Shared code example boxes contain language-specific snippets or
placeholders for every language
- [ ] API reference details contain working API reference links or
generic content
- [ ] Realm naming/language has been updated
- [ ] All relevant content from individual SDK pages is present on the
consolidated page

Author: dacharyc

source/includes/api-details/csharp/sync/manage-sync-sessions-check-upload-and-download-progress-description.rst

@@ -24,3 +24,7 @@ as a double between 0.0 and 1.0.
 
 Once you no longer wish to receive notifications, unregister the token with 
 ``token.Dispose()``.
+
+In the following example, we subscribe to a progress observable on the
+``session`` to listen for upload events. When this callback is triggered, it
+prints the upload progress as a percentage.

source/includes/api-details/javascript/crud/create-counter-property-type-description.rst

@@ -0,0 +1,11 @@
+To initialize a :js-sdk:`Counter <classes/Realm.Types.Counter.html>`, create
+your object using the ``realm.create()`` method. Pass in your :ref:`object
+schema <sdks-object-schema>` and initial counter value, as well as initial
+values for any other properties the object has.
+
+After initialization, you can use the following methods to modify the counter
+value:
+
+- ``increment()`` and ``decrement()`` update the underlying value by a
+  specified number.
+- ``set()`` reassigns the counter to a specified value.

source/includes/api-details/javascript/crud/create-counter-property-type-not-supported.rst

@@ -36,9 +36,8 @@
      - id: javascript
        content: |
 
-         .. literalinclude:: /examples/MissingPlaceholders/api.js
+         .. literalinclude:: /examples/generated/node/data-types.test.snippet.initialize-counter.js
             :language: javascript
-            :copyable: false
 
      - id: kotlin
        content: |
@@ -63,6 +62,5 @@
      - id: typescript
        content: |
 
-         .. literalinclude::  /examples/MissingPlaceholders/api.ts
+         .. literalinclude:: /examples/generated/node/data-types.test.snippet.initialize-counter.ts 
             :language: typescript
-            :copyable: false

source/includes/api-details/typescript/crud/create-counter-property-type-not-supported.rst

@@ -10,7 +10,7 @@
      - id: csharp
        content: |
 
-         .. literalinclude:: /examples/MissingPlaceholders/example.cs
+         .. literalinclude:: /examples/generated/dotnet/ProgressNotifications.snippet.upload-download-progress-notification.cs
             :language: csharp
 
      - id: dart

source/includes/sdk-examples/crud/create-counter-property-type.rst

@@ -154,7 +154,7 @@ counter.
    .. tab::
       :tabid: javascript
 
-      .. include:: /includes/api-details/javascript/crud/create-counter-property-type-not-supported.rst
+      .. include:: /includes/api-details/javascript/crud/create-counter-property-type-description.rst
 
    .. tab::
       :tabid: kotlin
@@ -174,7 +174,7 @@ counter.
    .. tab::
       :tabid: typescript
 
-      .. include:: /includes/api-details/typescript/crud/create-counter-property-type-not-supported.rst
+      .. include:: /includes/api-details/javascript/crud/create-counter-property-type-description.rst
 
 .. include:: /includes/sdk-examples/crud/create-counter-property-type.rst