[ReactNative] Move module info from bridge to RCTModuleData

Summary:
@public

The info about bridge modules (such as id, name, queue, methods...) was spread
across arrays & dictionaries on the bridge, move it into a specific class.

It also removes a lot of information that was statically cached, and now have
the same lifecycle of the bridge.

Also moved RCTModuleMethod, RCTFrameUpdate and RCTBatchedBridge into it's own
files, for organization sake.

NOTE: This diff seems huge, but most of it was just moving code :)

Test Plan:
Tested UIExplorer & UIExplorer tests, Catalyst, MAdMan and Groups. Everything
looks fine.

React/Base/RCTModuleMethod.h

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class RCTBridge;
+
+typedef NS_ENUM(NSUInteger, RCTJavaScriptFunctionKind) {
+  RCTJavaScriptFunctionKindNormal,
+  RCTJavaScriptFunctionKindAsync,
+};
+
+@interface RCTModuleMethod : NSObject
+
+@property (nonatomic, copy, readonly) NSString *moduleClassName;
+@property (nonatomic, copy, readonly) NSString *JSMethodName;
+@property (nonatomic, assign, readonly) SEL selector;
+@property (nonatomic, assign, readonly) RCTJavaScriptFunctionKind functionKind;
+
+- (instancetype)initWithObjCMethodName:(NSString *)objCMethodName
+                          JSMethodName:(NSString *)JSMethodName
+                           moduleClass:(Class)moduleClass NS_DESIGNATED_INITIALIZER;
+
+- (void)invokeWithBridge:(RCTBridge *)bridge
+                  module:(id)module
+               arguments:(NSArray *)arguments
+                 context:(NSNumber *)context;
+
+@end