feature(cli): add a command to generate a llm-ready report

[PierreCapel]

Introduces a new CLI command, generate-llm-input that fetches the latest analysis for a specific project and generates a structured, context-rich Markdown prompt which is outputted in the console.

This output can be directly fed into an LLM to receive actionable code fixes that adhere to Symfony best practices.
The current prompt states to provide different output based on who it is fed to: IDE integrated LLM with code access will provide patches whereas LLM chats will provide code example and explanations.

Security violations are excluded by default to prevent accidental leakage of vulnerability details to public AI models. (can be included with --with-security-violations flag, that would require user confirmation before proceeding).

Added a --show-ignored-violations flag to include or not ignored violations, similar to the analysis command.

[nicolas-grekas]

dumping the report into a file we should just put it in the system clipboard

just printing on the console is the best IMHO
ppl that want a file can pipe to a file

[PierreCapel]

@nicolas-grekas thanks, updated per your recommendations