Fix test suite and improve documentation (#3)

* Fix tests and update timezone identifier format in documentation

- Fix americaNew_York to americaNewYork in code examples
- Update generated file name from TimeZoneModule.pkl.swift to TimeZoneIdentifier.swift
- Maintain consistent identifier formatting throughout README

.gitignore

@@ -4,6 +4,7 @@
 /Packages
 xcuserdata/
 DerivedData/
+.swiftpm/
 .swiftpm/configuration/registries.json
 .swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
 .netrc

README.md

@@ -13,7 +13,7 @@ Add SwiftTZ to your `Package.swift` file:
 
 ```swift
 dependencies: [
-  .package(url: "https://github.com/vamsi777/SwiftTZ.git", from: "0.1.0")
+  .package(url: "https://github.com/vamsi777/SwiftTZ.git", from: "0.2.0")
 ]
 ```
 
@@ -24,7 +24,7 @@ To use a timezone, create a `TimeZone` instance using a `TimeZoneIdentifier`:
 ```swift
 import SwiftTZ
 
-let newYork = TimeZone(.americaNew_York)
+let newYork = TimeZone(.americaNewYork)
 print(newYork.identifier) // "America/New_York"
 ```
 
@@ -33,7 +33,7 @@ print(newYork.identifier) // "America/New_York"
 The `TimeZone` initializer that takes a `TimeZoneIdentifier` will never fail because the set of identifiers is statically known and known to be valid.  
 
 ```swift
-let newYork = TimeZone(.americaNew_York)
+let newYork = TimeZone(.americaNewYork)
 print(newYork.identifier) // "America/New_York"
 ```
 
@@ -66,7 +66,7 @@ git clone https://github.com/vamsi777/SwiftTZ.git
 cd SwiftTZ
 ```
 
-2. Run the generator to fetch the latest IANA Time Zone Database and generate the `TimeZoneModule.pkl.swift` file
+2. Run the generator to fetch the latest IANA Time Zone Database and generate the `TimeZoneIdentifier.swift` file
 
 ```sh
 swift run tzdb-gen

Tests/SwiftTZTests/TimeZoneTests.swift

@@ -6,21 +6,21 @@ import Testing
 struct TimeZoneTests {
   @Test func timeZoneCreation() {
     // Test valid timezone creation
-    #expect(throws: Never.self) { TimeZone(identifier: .americaNew_York) }
+    #expect(throws: Never.self) { TimeZone(identifier: .americaNewYork) }
     #expect(throws: Never.self) { TimeZone(.europeLondon) }
     #expect(throws: Never.self) { TimeZone(.asiaTokyo) }
 
     // Test timezone properties
-    let nyTz = TimeZone(.americaNew_York)
-    #expect(nyTz.timeZoneIdentifier == .americaNew_York)
+    let nyTz = TimeZone(.americaNewYork)
+    #expect(nyTz.timeZoneIdentifier == .americaNewYork)
     #expect(nyTz.identifier == "America/New_York")
   }
 
   @Test func commonTimeZones() {
     // Test some commonly used timezones
     let timezones: [TimeZoneIdentifier] = [
       .europeLondon,  // UTC+0/+1
-      .americaNew_York,  // UTC-5/-4
+      .americaNewYork,  // UTC-5/-4
       .asiaTokyo,  // UTC+9
       .australiaSydney,  // UTC+10/+11
       .pacificHonolulu,  // UTC-10
@@ -34,7 +34,7 @@ struct TimeZoneTests {
 
   @Test func timeZoneRoundTrip() {
     // Test that converting from Foundation.TimeZone to our identifier and back works
-    let originalTz = TimeZone(.americaNew_York)
+    let originalTz = TimeZone(.americaNewYork)
     let identifier = originalTz.timeZoneIdentifier
     let roundTripTz = TimeZone(identifier)
 
@@ -52,7 +52,7 @@ struct TimeZoneTests {
 
   @Test func timeZoneOffsets() {
     // Test timezone offset calculations
-    let nyTz = TimeZone(.americaNew_York)
+    let nyTz = TimeZone(.americaNewYork)
     let tokyoTz = TimeZone(.asiaTokyo)
 
     // Create dates using Calendar to ensure proper date creation