Set component names explicitly

.. rather than guessing from type name,
which can be pretty inaccurate at times.

src/meta.zig

@@ -85,11 +85,3 @@ pub fn AnyToType(comptime expr: anytype) type {
         else => @compileError("Expression must be a type or a tuple of two types"),
     }
 }
-
-/// Gets the simplified type name of the specified type.
-/// That is, without any namespace qualifiers.
-pub fn simpleTypeName(comptime T: type) [:0]const u8 {
-    const fullName = @typeName(T);
-    const index = std.mem.lastIndexOf(u8, fullName, ".");
-    return if (index) |i| fullName[(i + 1)..] else fullName;
-}

src/world.zig

@@ -137,17 +137,15 @@ pub fn World(comptime ctx: anytype) type {
             return Entity.init(self, config, add);
         }
 
-        pub fn tag(self: *Self, comptime T: type) !Entity {
+        pub fn tag(self: *Self, name: [:0]const u8, comptime T: type) !Entity {
             if (@sizeOf(T) > 0) @compileError("'" ++ @typeName(T) ++ "' must be a zero-sized type");
-            const name = meta.simpleTypeName(T);
             const result = try self.entity(.{ .name = name, .symbol = name }, .{});
             Context.lookupMut(T).* = result.raw;
             return result;
         }
 
-        pub fn component(self: *Self, comptime T: type) !Entity {
+        pub fn component(self: *Self, name: [:0]const u8, comptime T: type) !Entity {
             if (@sizeOf(T) == 0) @compileError("'" ++ @typeName(T) ++ "' must not be a zero-sized type");
-            const name = meta.simpleTypeName(T);
             const entity_ = try self.entity(.{ .name = name, .symbol = name, .use_low_id = true }, .{});
 
             const result = c.ecs_component_init(self.raw, &.{
@@ -169,8 +167,8 @@ pub fn World(comptime ctx: anytype) type {
         /// Use `get()` and `set()` to get and set the value of this singleton.
         ///
         /// Returns the created component entity.
-        pub fn singleton(self: *Self, comptime T: type, value: T) !Entity {
+        pub fn singleton(self: *Self, name: [:0]const u8, comptime T: type, value: T) !Entity {
-            const single = try component(self, T);
+            const single = try component(self, name, T);
             single.set(T, value);
             return single;
         }