Feat/shm

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Pull Request Overview

This PR introduces shared memory support and refactors several core components to improve API design and eliminate global mutable state. The changes focus on making the codebase more modular and thread-safe.

Key changes:

• Added POSIX shared memory wrapper with comprehensive test coverage and examples
• Refactored IPC initialization to use const reference instead of move semantics
• Redesigned EgoClock API from static to instance-based to support multiple named clocks

Reviewed Changes

Copilot reviewed 48 out of 48 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
modules/common/realtime/include/grape/realtime/shared_memory.h	New POSIX shared memory API with RAII semantics
modules/common/realtime/src/shared_memory.cpp	Implementation of shared memory creation, mapping, and management
modules/common/realtime/tests/shared_memory_tests.cpp	Comprehensive test coverage for shared memory operations
modules/common/realtime/examples/shm_futex_example.cpp	Producer-consumer example using shared memory and futex
modules/common/realtime/examples/shared_memory_bench.cpp	Performance benchmarks for shared memory operations
modules/common/ipc/include/grape/ipc/session.h	Changed init() parameter from rvalue to const reference
modules/common/ipc/src/session.cpp	Refactored to use atomic flag and atexit instead of RAII Manager
modules/common/ipc/py/session_bindings.cpp	Updated Python bindings to match new signature
modules/experimental/robot/ego_clock/include/grape/ego_clock.h	Changed from static API to instance-based with factory method
modules/experimental/robot/ego_clock/src/ego_clock.cpp	Removed global state, added Impl class with per-instance receiver
modules/experimental/robot/ego_clock/src/clock_data.h	Changed ClockTopic from struct to class with topic name composition
modules/experimental/robot/ego_clock/src/ego_clock_driver.cpp	Added clock_name to Config and ClockTopic initialization
modules/common/utils/include/grape/utils/file_system.h	Added getSystemName() and moved getHostName() from ip.h
modules/common/utils/src/file_system.cpp	Implementation of getSystemName() with env/file/hostname fallback
modules/experimental/robot/locomotion/interface/include/grape/locomotion/topics.h	Refactored topics to store composed topic_name instead of robot_name
external/third_party_versions.cmake	Updated SDL3 from 3.2.24 to 3.2.26
external/CMakeLists.txt	Enabled eCAL apps, ftxui, timeplugins, and additional third-party libs

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