Implemented the enhancing of religions (#4965)

* Generalize the concept of founding religions in preparation of enhancing

* Implemented enhancing religions

* Added all enhancer beliefs (mostly correctly, mostly tested)

* You can now found a religion without a pantheon, requiring you to choose a pantheon as well

* Parameterized 'enhance religion' action, fixed tests

* Implemented requested changes & simplified beliefContainer a lot

* Fixed rename

* Updated code to include features added in the meantime

* Merge branch 'master' into enhanceReligions

Co-authored-by: Yair Morgenstern <yairm210@hotmail.com>

android/assets/jsons/translations/template.properties

@@ -521,7 +521,7 @@ Received [goldAmount] Gold for capturing [cityName] =
 Our proposed trade is no longer relevant! = 
 [defender] could not withdraw from a [attacker] - blocked. = 
 [defender] withdrew from a [attacker] = 
-[building] has provided [amount] Gold! = 
+By expending your [unit] you gained [Stats]! =  
 [civName] has stolen your territory! = 
 Clearing a [forest] has created [amount] Production for [cityName] = 
 [civName] assigned you a new quest: [questName]. = 
@@ -739,6 +739,8 @@ Spread Religion =
 Spread [religionName] = 
 Remove Heresy = 
 Found a Religion = 
+Enhance a Religion = 
+Enhance [religionName] = 
 Your citizens have been happy with your rule for so long that the empire enters a Golden Age! = 
 You have entered the [newEra]! = 
 [civName] has entered the [eraName]! =