feat: extract map and where into Sequence base class for List and Range

Extract the common `map` and `where` methods from `List` into a new `Sequence` base class, making `List is Sequence` and `Range is Sequence`. Remove duplicate native method registrations for Range in wren_core.c and add new test files for Range map/where operations.

test/range/map.wren

@@ -0,0 +1,3 @@
+var a = 1..3
+var b = a.map(fn (x) x + 1)
+IO.print(b) // expect: [2, 3, 4]

test/range/type.wren

@@ -1,6 +1,7 @@
 var range = 2..5
 
 IO.print(range is Range)      // expect: true
+IO.print(range is Sequence)   // expect: true
 IO.print(range is Object)     // expect: true
 IO.print(range is String)     // expect: false
 IO.print(range.type == Range) // expect: true

test/range/where.wren

@@ -0,0 +1,6 @@
+var a = 1..3
+var b = a.where(fn (x) x > 1)
+IO.print(b) // expect: [2, 3]
+
+var c = a.where(fn (x) x > 10)
+IO.print(c) // expect: []