Enable some more clang-tidy linter checks (#4738)

* Avoid inefficient AString -> c_str() -> AString round trip

* Avoid redundant string init expressions

* Avoid unnecessary return, continue, etc.

* Add .clang-format to help with clang-tidy fix-its

* Avoid unnecessary passing by value

* Avoid unnecessary local copying

* Avoid copying in range-for loops

* Avoid over-complicated boolean expressions

* Some violations missed by my local clang-tidy

* Allow unnecessary continue statements

* Add brackets

* Another expression missed locally

* Move BindingsProcessor call into clang-tidy.sh and add space

* Fix pushd not found error

* Different grouping of CheckBlockInteractionRate

src/BlockEntities/MobSpawnerEntity.cpp

@@ -76,14 +76,7 @@ bool cMobSpawnerEntity::UsedBy(cPlayer * a_Player)
 
 void cMobSpawnerEntity::UpdateActiveState(void)
 {
-	if (GetNearbyPlayersNum() > 0)
-	{
-		m_IsActive = true;
-	}
-	else
-	{
-		m_IsActive = false;
-	}
+	m_IsActive = (GetNearbyPlayersNum() > 0);
 }