- renamed `build.yml` to `ci.yml`
- use toml-sort action in `ci.yml`
- removed `toml-sort.yml`
- removed cargo check job
- perform tests with nextest instead of cargo test
- added llvm cov for coverage ~ fixes #106
- added `--no-deps` arg to clippy
- bumped version for upgraded actions
- removed unmaintained actions
- created `rust-toolchain.toml` with stable channel
- tests and clippy are run after rustfmt and toml-sort are successful
- tests and clippy's target is cached even on failure

Signed-off-by: muraca <mmuraca247@gmail.com>

- print lines coverage to actions cli output
- comment PR with report when allowed

Signed-off-by: muraca <mmuraca247@gmail.com>