split events into spearate package (#216)

motivation:
the runtime library has a stable API while the events are still moving target. In order to provide a 1.0 stable version we separate them out

changes:
* remove Events module
* update readme
* update Samples
* remove gateway example

Co-authored-by: Fabian Fett <fabianfett@apple.com>

Author: tomerd

Examples/LambdaFunctions/Package.swift

@@ -14,8 +14,6 @@ let package = Package(
         .executable(name: "Benchmark", targets: ["Benchmark"]),
         // demonstrate different types of error handling
         .executable(name: "ErrorHandling", targets: ["ErrorHandling"]),
-        // demostrate how to integrate with AWS API Gateway
-        .executable(name: "APIGateway", targets: ["APIGateway"]),
         // fully featured example with domain specific business logic
         .executable(name: "CurrencyExchange", targets: ["CurrencyExchange"]),
     ],
@@ -35,10 +33,6 @@ let package = Package(
         .target(name: "ErrorHandling", dependencies: [
             .product(name: "AWSLambdaRuntime", package: "swift-aws-lambda-runtime"),
         ]),
-        .target(name: "APIGateway", dependencies: [
-            .product(name: "AWSLambdaRuntime", package: "swift-aws-lambda-runtime"),
-            .product(name: "AWSLambdaEvents", package: "swift-aws-lambda-runtime"),
-        ]),
         .target(name: "CurrencyExchange", dependencies: [
             .product(name: "AWSLambdaRuntime", package: "swift-aws-lambda-runtime"),
         ]),

Examples/LambdaFunctions/Sources/APIGateway/main.swift

@@ -9,8 +9,6 @@ let package = Package(
         .library(name: "AWSLambdaRuntime", targets: ["AWSLambdaRuntime"]),
         // this has all the main functionality for lambda and it does not link Foundation
         .library(name: "AWSLambdaRuntimeCore", targets: ["AWSLambdaRuntimeCore"]),
-        // common AWS events
-        .library(name: "AWSLambdaEvents", targets: ["AWSLambdaEvents"]),
         // for testing only
         .library(name: "AWSLambdaTesting", targets: ["AWSLambdaTesting"]),
     ],
@@ -41,8 +39,6 @@ let package = Package(
             .byName(name: "AWSLambdaRuntimeCore"),
             .byName(name: "AWSLambdaRuntime"),
         ]),
-        .target(name: "AWSLambdaEvents", dependencies: []),
-        .testTarget(name: "AWSLambdaEventsTests", dependencies: ["AWSLambdaEvents"]),
         // testing helper
         .target(name: "AWSLambdaTesting", dependencies: [
             .byName(name: "AWSLambdaRuntime"),