improve the CI linting steps

[pythops]

Catch more errors/warnings. The main branch has those warnings for example

error: field `content_type` is never read
  --> src/lsp/transport.rs:30:9
   |
28 | pub struct Header {
   |            ------ field in this struct
29 |     pub content_length: usize,
30 |     pub content_type: Option<String>,
   |         ^^^^^^^^^^^^
   |
   = note: `-D dead-code` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(dead_code)]`

error: field `0` is never read
  --> src/socketwrapper.rs:17:8
   |
17 |     Ip(net::SocketAddr),
   |     -- ^^^^^^^^^^^^^^^
   |     |
   |     field in this variant
   |
help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
   |
17 |     Ip(()),
   |        ~~

error: field `0` is never read
  --> src/socketwrapper.rs:19:10
   |
19 |     Unix(tokio::net::unix::SocketAddr),
   |     ---- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |     |
   |     field in this variant
   |
help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
   |
19 |     Unix(()),
   |          ~~

error: could not compile `ra-multiplex` (lib) due to 3 previous errors
111

[pr2502]

hi, thanks for pointing this out, this warning is new with rustc 1.79.0 (probably rust-lang/rust#118297) which is why i haven't noticed before as i'm still using 1.78 for development. i don't want the CI to stop working whenever rustc introduces new warnings so i won't be merging this