Add 'get_network_routes' tool

[subpop]

Add a fixed 'get_network_routes' tool. Inspired by the now stale #263.

[github-actions]

For team members: test commit 612204f in internal GitLab

[codecov]

Codecov Report

❌ Patch coverage is 91.66667% with 8 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/linux_mcp_server/parsers.py	82.22%	5 Missing and 3 partials ⚠️

Flag	Coverage Δ
unittests	96.35% <91.66%> (-0.11%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/linux_mcp_server/commands.py	89.47% <ø> (ø)
src/linux_mcp_server/formatters.py	95.76% <100.00%> (+0.43%)	⬆️
src/linux_mcp_server/models.py	100.00% <100.00%> (ø)
src/linux_mcp_server/tools/__init__.py	100.00% <100.00%> (ø)
src/linux_mcp_server/tools/network.py	100.00% <100.00%> (ø)
tests/tools/test_network.py	100.00% <100.00%> (ø)
src/linux_mcp_server/parsers.py	83.62% <82.22%> (-0.27%)	⬇️

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[alexxa]

/retest

[alexxa]

Functional Tests failed due to the python default issue which was fixed and merged in #396 . When rebased, it perhaps will fail again unless #407 is merged first.