This commit provides an example of mocking the
high level client

Relates #79

The version pinning was lost in merges in the related PR. This
commit addresses that.

This commit pins the SDK version used for compilation to
.net 8 to match the build and test projects.

There is an issue with `dotnet format` command when building
with certain versions of .net 9 SDK that results in:

```
Unhandled exception: System.Exception: source text did not have an identifiable encoding
```

Looks related to dotnet/sdk#46780, which is fixed in later .net 9 versions. The build doesn't need .net 9, so best to pin to .net 8.

* 1.14.0

Signed-off-by: Anush008 

* Update Expression.cs

* chore: Dictionary to Value

Signed-off-by: Anush008 

* chore: Review updates

Signed-off-by: Anush008 

* Use Qdrant version v1.14.0

Co-authored-by: Anush  

---------

Signed-off-by: Anush008 
Co-authored-by: Tim Visée