Release/1.6.0 (#2106)

* Fixing paths for build procedure

* Adding back env file

* Updating pyproject and setup.nsi files for release

* Update version on feature_flags.py

* Fix default sources path not working in installers

* Fix crypto/ov/wf

* Remove old and slow tests from openbb scripts folder

* Adding a note about to explain that prediction is not available for Mac users

* Disabling prediction menu via env file

* Fix tkinter bug on windows ci by specifying the mpl backend

* Adding prediction back in and deleting previous comments about prediction not being available

Co-authored-by: Chavithra PARANA <chavithra@gmail.com>
Co-authored-by: Theodore Aptekarev <aptekarev@gmail.com>

.github/workflows/windows.yml

@@ -95,6 +95,8 @@ jobs:
           pip list
 
       - name: Run tests (Bash)
+        env:
+            MPLBACKEND: Agg
         shell: bash -l {0}
         run: pytest tests/ -m "not bots and not linux"