Upgrade minimum gcc version to 13, ruby to 3.0

[jwillemsen]

* .github/workflows/linux.yml:
* docs/src/getting_started.adoc:
* tests/tie/client.cpp:
* tests/tie/server.cpp:

Summary by CodeRabbit

• Documentation

  • Updated minimum compiler requirement to GCC 13+ (previously 11+)
  • Updated Ruby version requirements to 3.0-3.1.2
  • Added documentation describing memory management improvements using modern C++ semantics (std::shared_ptr, std::weak_ptr, move semantics)

• Chores

  • Updated CI workflow to target Ubuntu 24.04 with GCC 13/14 and newer Ruby versions
  • Simplified build test cases by removing conditional compilation directives

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR updates CI configuration to target Ubuntu 24.04 with GCC 13+, updates documentation prerequisites accordingly, and removes conditional compilation guards from test code related to TIE specialization handling, simplifying the build requirements and test logic.

Changes

Cohort / File(s)	Summary
CI Workflow Configuration .github/workflows/linux.yml	Updated Linux CI matrix to target Ubuntu 24.04 with GCC 13/14, introduced make_flags parameters (--release, --debug), adjusted Ruby versions (3.0–3.2), and propagated make_flags to build step invocations; removed entries for older GCC/Ubuntu combinations.
Documentation Updates docs/src/getting_started.adoc	Updated compiler prerequisites from GCC 11+ to 13+, tightened Ruby prerequisites from 2.5–3.1.2 to 3.0–3.1.2, and expanded memory management documentation for IDL-to-C++11 mapping to reflect std::shared_ptr/std::weak_ptr semantics.
Test Code Simplification tests/tie/client.cpp, tests/tie/server.cpp	Removed TAOX11_LACKS_TIE_SPECIALIZATION conditional branch in client test; removed GCC-specific preprocessor guards in server test, making TIE specialization handling unconditional.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• Updated required packages #425: Updates docs/src/getting_started.adoc with prerequisite and IDL-to-C++11 memory management documentation changes.

Poem

🐰 Ubuntu's grown up, GCC too—
Thirteen's the new standard, shiny and new,
No more condition forks, guards shed away,
Simpler bindings—hooray, hooray!

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main changes: upgrading GCC from 11+ to 13+ and Ruby from 2.5 to 3.0, which are the primary updates across the documentation, workflows, and test files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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