Feat/toml file config

[dzdidi]

Blocked by / Based on #5

[Copilot]

Pull request overview

This pull request migrates the configuration file format from JSON to TOML and adds two new delay configuration options for the probing feature. The migration improves configuration readability while maintaining backward compatibility through serde defaults.

Changes:

• Migrated configuration format from config.json to config.toml throughout the codebase
• Added probe_delay_sec and peer_delay_sec configuration fields to control timing between probes and peers
• Implemented delay logic in the probing functionality to rate-limit probe requests

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/config.rs	Updated to parse TOML format instead of JSON; added two new delay configuration fields with default values (1s and 2s)
src/main.rs	Implemented probe and peer delay logic in the probing loop; updated warning messages to reference config.toml
src/cli.rs	Added probe_delay_sec and peer_delay_sec fields to ProbingConfig struct; updated comment to reference config.toml
src/args.rs	Updated usage message to reference config.toml instead of config.json
Cargo.toml	Added toml crate dependency version 0.8
Cargo.lock	Lock file updates for toml crate and its dependencies (serde_spanned, toml_datetime, toml_edit, toml_write, winnow)
config.example.toml	New TOML example configuration file with all fields including new delay settings
config.example.json	Removed JSON example configuration file
README.md	Updated documentation to reference TOML format throughout and replaced JSON example with TOML syntax
prober_config.json.example	Added probe_delay_sec and peer_delay_sec fields to example

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[Copilot]

The probing configuration example is missing the new probe_delay_sec and peer_delay_sec fields that were added in this PR. These fields should be included in the example for completeness and consistency with the other example configurations (config.example.toml and the help text in src/config.rs).