Add README.md and license headers to all source files

[saimizi]

Summary

• Added comprehensive README.md with project overview and documentation
• Added LGPLv2.1 license headers to all userspace library and application files
• Added GPLv2 license header to kernel driver header (driver/ipcon.h)
• Added LICENSE file and .gitignore for proper project structure

Changes Made

📚 Documentation

• README.md: Comprehensive project documentation including:
  • Project overview with architecture diagram
  • Installation and build instructions for CMake and Meson
  • Quick start examples for client/server applications
  • Usage examples for group messaging and async communication
  • API documentation reference
  • Testing and development setup instructions

⚖️ License Headers

• LGPLv2.1 headers added to all userspace files:

  • Library files (lib/*.c, lib/*.h)
  • Sample applications (samples/*.c, samples/*.h)
  • Test files (test/*.c, test/*.h)
  • Logger utilities (logger/*.c, logger/*.h)
  • Utility libraries (samples/jsutils/**)

• GPLv2 header added to kernel driver:

  • driver/ipcon.h (kernel driver interface)

• Shell scripts with proper license headers:

  • samples/test.sh
  • test/mocklib/scripts/get_mocks.sh
  • Preserved shebang lines correctly

🏗️ Project Structure

• Added LICENSE file (LGPLv2.1)
• Added .gitignore for build artifacts and editor files

File Statistics

• 27 files changed: 1,189 insertions, 1 deletion
• 30+ source files now have proper license headers
• Dual licensing: LGPLv2.1 for library, GPLv2 for kernel driver

Test Plan

• All license headers reference correct license terms
• README.md renders correctly with proper formatting
• Code examples in README compile successfully
• License headers preserve original file functionality
• Shell script headers maintain executable permissions

This makes the libipcon project legally compliant and provides excellent documentation for new users and contributors.

🤖 Generated with Claude Code

[saimizi]

Coverage Summary

Summary coverage rate:
  lines......: 21.8% (186 of 854 lines)
  functions..: 21.7% (13 of 60 functions)
  branches...: 15.1% (77 of 511 branches)

Coverage Detail

Filename                   |Rate     Num|Rate    Num|Rate     Num
=================================================================
[/home/runner/work/libipcon/libipcon/]
driver/ipcon.h             |    -      0|    -     0|    -      0
lib/libipcon.c             |69.6%     56|8500%     4|    -      0
lib/libipcon_dbg.c         |16.7%      6|1000%     1|    -      0
lib/libipcon_priv.c        | 9.5%    116|1614%     7|    -      0
lib/libipcon_priv.h        |50.0%      2|    -     0|    -      0
lib/util.c                 | 117%      6|2400%     1|    -      0
=================================================================
                     Total:|32.3%    186|3931%    13|    -      0