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>

scripts/test_crypto_defi.openbb

@@ -3,12 +3,8 @@ defi
 ldapps
 gdapps
 stvl
-dtvl anchor,sushiswap
 newsletter
 dpi
-funding
-borrow
-lending
 tokens
 stats
 pools

scripts/test_stocks_dps.openbb

@@ -5,10 +5,6 @@ hsi
 pos
 sidtc
 load -t gme
-dpotc
 spos
 psi
-volexch
-ftd
-prom
-exit
+exit