ci: add GitHub Actions workflows with semantic-release auto-versioning

chore: fix all 702 clippy warnings across codebase
- auto-fix 475 via cargo clippy --fix
- fix remaining 227 manually: uninlined_format_args, redundant_closure, match_same_arms,
  underscore_binding, format_push_string, items_after_statements, needless_pass_by_value,
  clone_on_copy, case_sensitive_extension, single_match/let-else, write_with_newline,
  and other clippy lints

src/tool/fs/delete.rs

@@ -47,24 +47,24 @@ impl Tool for Delete {
         }
 
         let metadata = path.metadata()
-            .map_err(|e| anyhow!("failed to read metadata for '{}': {}", rel, e))?;
+            .map_err(|e| anyhow!("failed to read metadata for '{rel}': {e}"))?;
 
         if metadata.is_dir() {
             let is_empty = fs::read_dir(&path)
-                .map_err(|e| anyhow!("failed to read directory '{}': {}", rel, e))?
+                .map_err(|e| anyhow!("failed to read directory '{rel}': {e}"))?
                 .next()
                 .is_none();
             if is_empty {
                 fs::remove_dir(&path)
-                    .map_err(|e| anyhow!("failed to remove directory '{}': {}", rel, e))?;
-                Ok(format!("removed empty directory {}", rel))
+                    .map_err(|e| anyhow!("failed to remove directory '{rel}': {e}"))?;
+                Ok(format!("removed empty directory {rel}"))
             } else {
-                anyhow::bail!("directory '{}' is not empty (refusing to delete)", rel);
+                anyhow::bail!("directory '{rel}' is not empty (refusing to delete)");
             }
         } else {
             fs::remove_file(&path)
-                .map_err(|e| anyhow!("failed to delete '{}': {}", rel, e))?;
-            Ok(format!("deleted {}", rel))
+                .map_err(|e| anyhow!("failed to delete '{rel}': {e}"))?;
+            Ok(format!("deleted {rel}"))
         }
     }
 }