refactor: rename Sequence method forall to all across core lib, C source, and test files

test/list/forall.wren

@@ -1,9 +1,9 @@
 var a = [1, 2, 3]
-var b = a.forall {|x| x > 1 }
+var b = a.all {|x| x > 1 }
 IO.print(b) // expect: false
 
-var d = a.forall {|x| x > 0 }
+var d = a.all {|x| x > 0 }
 IO.print(d) // expect: true
 
-var e = [].forall {|x| false }
+var e = [].all {|x| false }
 IO.print(e) // expect: true

test/list/forall_non_bool_returning_fn.wren

@@ -1 +1 @@
-[1, 2, 3].forall {|x| "string" } // expect runtime error: String does not implement method '!' with 0 arguments.
+[1, 2, 3].all {|x| "string" } // expect runtime error: String does not implement method '!' with 0 arguments.

test/list/forall_non_function_arg.wren

@@ -1 +1 @@
-[1, 2, 3].forall("string") // expect runtime error: String does not implement method 'call' with 1 argument.
+[1, 2, 3].all("string") // expect runtime error: String does not implement method 'call' with 1 argument.