[core:container/bit_vector] Create new package.

A dynamic bit array, optionally allowing negative indices.

core/container/bit_array/doc.odin

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+package dynamic_bit_array
+
+/*
+	The Bit Array can be used in several ways:
+
+	-- By default you don't need to instantiate a Bit Array:
+
+		package test
+
+		import "core:fmt"
+		import "core:container/bit_array"
+
+		main :: proc() {
+			using bit_array
+
+			bits: Bit_Array
+
+			// returns `true`
+			fmt.println(set(&bits, 42))
+
+			// returns `false`, `false`, because this Bit Array wasn't created to allow negative indices.
+			was_set, was_retrieved := get(&bits, -1)
+			fmt.println(was_set, was_retrieved) 
+		}
+
+	-- A Bit Array can optionally allow for negative indices, if the mininum value was given during creation:
+
+		package test
+
+		import "core:fmt"
+		import "core:container/bit_array"
+
+		main :: proc() {
+			Foo :: enum int {
+				Negative_Test = -42,
+				Bar           = 420,
+				Leaves        = 69105,
+			}
+
+			using bit_array
+
+			bits := create(int(max(Foo)), int(min(Foo)))
+			defer destroy(&bits)
+
+			fmt.printf("Set(Bar):           %v\n",     set(&bits, Foo.Bar))
+			fmt.printf("Get(Bar):           %v, %v\n", get(&bits, Foo.Bar))
+			fmt.printf("Set(Negative_Test): %v\n",     set(&bits, Foo.Negative_Test))
+			fmt.printf("Get(Leaves):        %v, %v\n", get(&bits, Foo.Leaves))
+			fmt.printf("Get(Negative_Test): %v, %v\n", get(&bits, Foo.Negative_Test))
+			fmt.printf("Freed.\n")
+		}
+*/