feat: add support for analysis mode

[not-matthias]

No description provided.

[Copilot]

Pull request overview

This PR adds support for a new "analysis" integration mode, allowing the instrumentation hooks to operate in three distinct modes: Valgrind, Perf, and Analysis. The implementation refactors existing code to use a common helper for FIFO-based instruments.

• Introduces the IntegrationMode enum and related protocol commands for mode detection
• Creates a generic FifoInstrument helper that validates the integration mode during initialization
• Refactors PerfInstrument to use the new helper and moves related code to runner_fifo.zig

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/shared.zig	Adds IntegrationMode enum and new Command variants for integration mode queries
src/runner_fifo.zig	New file containing refactored FIFO communication logic from perf.zig with mode detection
src/instruments/helper.zig	New generic FifoInstrument function that creates mode-validated instrument implementations
src/instruments/perf.zig	Refactored to use FifoInstrument helper, significantly reduced code
src/instruments/analysis.zig	New analysis instrument using the FifoInstrument helper
src/instruments/valgrind.zig	Updated init to return error when not instrumented for consistency
src/instruments/root.zig	Updated to support analysis mode with proper initialization order and delegation
src/c.zig	Removed protocol version validation logic (moved to runner_fifo.zig)

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[GuillaumeLagrange]

olgtm

[GuillaumeLagrange]

olgtm