docs: update SundialKitCombine version to 1.0.0-alpha.1

Updated documentation to reference the alpha version:
- README.md: Package.swift example
- Documentation.md: DocC installation instructions

Both dependencies now consistently show alpha versions:
- SundialKit: 2.0.0-alpha.1
- SundialKitCombine: 1.0.0-alpha.1

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: leogdion

README.md

@@ -75,7 +75,7 @@ let package = Package(
   platforms: [.iOS(.v16), .watchOS(.v9), .tvOS(.v16), .macOS(.v11)],
   dependencies: [
     .package(url: "https://github.com/brightdigit/SundialKit.git", from: "2.0.0-alpha.1"),
-    .package(url: "https://github.com/brightdigit/SundialKitCombine.git", from: "1.0.0")
+    .package(url: "https://github.com/brightdigit/SundialKitCombine.git", from: "1.0.0-alpha.1")
   ],
   targets: [
     .target(

Sources/SundialKitCombine/SundialKitCombine.docc/Documentation.md

@@ -41,7 +41,7 @@ Add SundialKit to your `Package.swift`:
 ```swift
 dependencies: [
   .package(url: "https://github.com/brightdigit/SundialKit.git", from: "2.0.0-alpha.1"),
-  .package(url: "https://github.com/brightdigit/SundialKitCombine.git", from: "1.0.0")
+  .package(url: "https://github.com/brightdigit/SundialKitCombine.git", from: "1.0.0-alpha.1")
 ],
 targets: [
   .target(