Add initial project structure with CMake configuration, Clang format …

[Katze719]

…and tidy settings, GitHub workflows, and integration tests for Windows serial communication bindings

[Copilot]

Pull request overview

This PR establishes the foundational structure for a Windows serial communication library with CMake build system, comprehensive tooling configuration, and CI/CD pipelines. It implements Windows-specific serial port operations (open, close, read, write) using Win32 APIs with overlapped I/O for asynchronous operations.

• Complete Windows serial communication implementation using Win32 overlapped I/O
• CMake-based build system with GoogleTest integration and git-based versioning
• Comprehensive development tooling (clang-format, clang-tidy) and GitHub Actions CI/CD workflows
• JSR package distribution setup with base64-encoded binary payloads for Deno FFI consumption

Reviewed changes

Copilot reviewed 25 out of 28 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
src/serial_open.cpp	Implements serial port opening with DCB configuration and overlapped I/O setup
src/serial_close.cpp	Handles serial port closing with proper handle validation
src/serial_read.cpp	Implements overlapped read operations with timeout and queuing support
src/serial_write.cpp	Implements overlapped write operations with FlushFileBuffers for reliability
src/detail/win32_helpers.hpp	Provides RAII handle wrapper and Win32 error handling utilities
tests/test_serial_arduino.cpp	GoogleTest-based integration tests for Arduino serial communication
integration_tests/integration_test.ts	Deno integration tests for FFI library loading
integration_tests/ffi_bindings.ts	Deno FFI symbol definitions for serial operations
CMakeLists.txt	CMake configuration with CPM package management and GoogleTest setup
.clang-format	Microsoft-style code formatting configuration
.clang-tidy	Comprehensive static analysis rules configuration
.github/workflows/cpp-tests.yml	CI workflow for C++ unit and integration tests
.github/workflows/deno-tests.yml	CI workflow for Deno FFI integration tests across versions
.github/workflows/build-deno-dll.yml	CI workflow for building and uploading DLL artifacts
.github/workflows/publish-jsr.yml	CD workflow for publishing to JSR with base64-encoded binaries
jsr/scripts/embed_binary.ps1	PowerShell script to embed DLL as base64 JSON for JSR
jsr/scripts/embed_binary.sh	Shell script for embedding binaries (Linux/Unix, potentially unused)
jsr/package/jsr.json.in	JSR package metadata template with version placeholder
jsr/package/README.md	Documentation for consuming the JSR package in Deno

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[Copilot]

The atob function used here is a browser API that doesn't exist in Deno. The code should use Deno's base64 decoding API instead. Replace with: const bytes = Deno.base64Decode(blob.data) or use the proper Deno.decode API.

Suggested change

	const bytes = new TextEncoder().encode(atob(blob.data));
	const bytes = Deno.base64Decode(blob.data);