[gabrielbmoro]

Summary

• Adds a pre-analysis validation step for eagle_eye_config.json.
• New EagleEyeConfigValidator rejects structurally invalid rules and files matched by more than one rule, exiting with code 1 before imports are analyzed.
• JSON parsing now raises a clear InvalidConfigException for malformed JSON, missing filePattern, wrong types, and invalid patterns instead of failing silently or with a raw TypeError.
• Updates getting-started docs, setup prompt, README, changelog, and AGENTS.md.

Validation rules

• filePattern must be a non-empty, valid regex (after * wildcard expansion).
• Dependency patterns must compile as regexes.
• A rule may define at most one of dependenciesAllowed: false, forbiddenDependencies, or exclusiveDependencies.
• Each file in lib/ must match at most one rule. Conflicts are reported with the file and every matching rule.

Tests

• dart analyze passes.
• dart test passes (55 tests).
• Manually verified the CLI exits 1 with a conflict report and exits 0 for a valid config.