fix(clippy): show full error blocks instead of truncated headline

[ousamabenyounes]

Summary

• Root cause: filter_cargo_clippy collected only the first line of each error (error: ... truncated to 160 chars), discarding the --> location, code snippet (|), and = note:/help: lines that make a compiler error actionable
• Impact: With -D warnings all warnings become errors — devs saw "cargo clippy: 3 errors, 0 warnings" but no information about what to fix
• Fix: State-machine collection of full multi-line error blocks (same approach as filter_cargo_build). Each block collects up to 15 lines; up to 10 blocks shown. Warning grouping by lint rule is unchanged.

Before / After

Before:

cargo clippy: 1 errors, 0 warnings
═══════════════════════════════════════

Error details:
  1. error[E0308]: mismatched types

After:

cargo clippy: 1 errors, 0 warnings
═══════════════════════════════════════

Errors:
  error[E0308]: mismatched types
   --> src/main.rs:10:5
    |
 10 |     "hello"
    |     ^^^^^^^ expected `i32`, found `&str`

Test plan

• test_filter_cargo_clippy_shows_full_error_block — headline + location + code context all shown
• test_filter_cargo_clippy_multiple_errors_show_all_blocks — both error locations shown
• All existing test_filter_cargo_clippy_* tests pass (updated section header check: "Errors:" not "Error details:")
• cargo fmt --all && cargo clippy --all-targets && cargo test --all ✅

Fixes #602

🤖 Generated with Ora Studio

[CLAassistant]

All committers have signed the CLA.

[aeppling]

Hey @ousamabenyounes , glad to have you back on RTK repo :)

Fix is clean, allowing 10line of error block which should be enough to display all required informations.

[aeppling]

Thanks for contributing to filter quality :)

[ousamabenyounes]

Thanks, really appreciate it!
Glad the fix helps — happy to contribute and improve things here

I’m working on this with my AI agents and a strong focus on quality — this project really matters to me because it brings real value (both economically and environmentally).

Kudos to you for building such a great momentum, and proud to contribute my piece to it !