Remove wildcard imports (#5018)

<!--
Please read the "Making a PR" section of
[`CONTRIBUTING.md`](https://github.com/emilk/egui/blob/master/CONTRIBUTING.md)
before opening a Pull Request!

* Keep your PR:s small and focused.
* The PR title is what ends up in the changelog, so make it descriptive!
* If applicable, add a screenshot or gif.
* If it is a non-trivial addition, consider adding a demo for it to
`egui_demo_lib`, or a new example.
* Do NOT open PR:s from your `master` branch, as that makes it hard for
maintainers to test and add commits to your PR.
* Remember to run `cargo fmt` and `cargo clippy`.
* Open the PR as a draft until you have self-reviewed it and run
`./scripts/check.sh`.
* When you have addressed a PR comment, mark it as resolved.

Please be patient! I will review your PR, but my time is limited!
-->

I removed (I hope so) all wildcard imports I found.

For me on my pc this improved the build time:
- for egui -5s
- for eframe -12s

* [x] I have followed the instructions in the PR template

Cargo.toml

@@ -118,6 +118,7 @@ unused_qualifications = "allow"
 [workspace.lints.rustdoc]
 all = "warn"
 missing_crate_level_docs = "warn"
+broken_intra_doc_links = "warn"
 
 # See also clippy.toml
 [workspace.lints.clippy]
@@ -248,6 +249,7 @@ use_self = "warn"
 useless_transmute = "warn"
 verbose_file_reads = "warn"
 wildcard_dependencies = "warn"
+wildcard_imports = "warn"
 zero_sized_map_values = "warn"
 
 # TODO(emilk): enable more of these lints:
@@ -262,4 +264,3 @@ unwrap_used = "allow"                 # TODO(emilk): We really wanna warn on thi
 manual_range_contains = "allow"       # this one is just worse imho
 self_named_module_files = "allow"     # Disabled waiting on https://github.com/rust-lang/rust-clippy/issues/9602
 significant_drop_tightening = "allow" # Too many false positives
-wildcard_imports = "allow"            # we do this a lot in egui