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/search.rs

@@ -59,10 +59,10 @@ impl Tool for Grep {
             .to_string();
         let path = resolve_path(&ctx.workspaces, &rel)?;
         if !path.exists() {
-            anyhow::bail!("path '{}' does not exist", rel);
+            anyhow::bail!("path '{rel}' does not exist");
         }
         if !path.is_dir() {
-            anyhow::bail!("path '{}' is not a directory", rel);
+            anyhow::bail!("path '{rel}' is not a directory");
         }
         let mut results: Vec<(String, usize, String)> = Vec::new();
         for entry in Walk::new(&path).flatten() {
@@ -83,10 +83,10 @@ impl Tool for Grep {
             }
         }
         if results.is_empty() {
-            return Ok(format!("no matches found for '{}' in {}", pattern, rel));
+            return Ok(format!("no matches found for '{pattern}' in {rel}"));
         }
         let output = results.iter()
-            .map(|(f, line, text)| format!("{}:{}:{}", f, line, text))
+            .map(|(f, line, text)| format!("{f}:{line}:{text}"))
             .collect::<Vec<_>>()
             .join("\n");
         Ok(format!("found {} matches:\n{}", results.len(), output))
@@ -144,14 +144,14 @@ impl Tool for Glob {
             .to_string();
         let root = resolve_path(&ctx.workspaces, &rel)?;
         if !root.exists() || !root.is_dir() {
-            anyhow::bail!("path '{}' is not a valid directory", rel);
+            anyhow::bail!("path '{rel}' is not a valid directory");
         }
         let mut builder = GlobSetBuilder::new();
         let full_pattern = root.join(&pat_str).display().to_string();
         builder.add(GlobBuilder::new(&full_pattern).build()
-            .map_err(|e| anyhow!("invalid glob pattern '{}': {}", pat_str, e))?);
+            .map_err(|e| anyhow!("invalid glob pattern '{pat_str}': {e}"))?);
         let glob_set = builder.build()
-            .map_err(|e| anyhow!("failed to build glob set: {}", e))?;
+            .map_err(|e| anyhow!("failed to build glob set: {e}"))?;
         let mut matches: Vec<String> = Vec::new();
         for entry in Walk::new(&root).flatten() {
             let p = entry.path();
@@ -165,7 +165,7 @@ impl Tool for Glob {
         }
         matches.sort();
         if matches.is_empty() {
-            return Ok(format!("no files match '{}' in {}", pat_str, rel));
+            return Ok(format!("no files match '{pat_str}' in {rel}"));
         }
         Ok(matches.join("\n"))
     }