chore(lint): replace docker-based precommit (#29)

.pre-commit-config.yaml

@@ -1,10 +1,9 @@
 repos:
-  - repo: https://github.com/oxsecurity/megalinter
-    rev: v8.4.2 # Git tag specifying the hook, not mega-linter-runner, version
+  - repo: https://github.com/golangci/golangci-lint
+    rev: v1.57.2
     hooks:
-      - id: megalinter-incremental # Faster, less thorough
-        stages:
-          - pre-commit
+      - id: golangci-lint
+        args: ["--timeout=5m"]
   - repo: https://github.com/tekwizely/pre-commit-golang
     rev: v1.0.0-rc.1
     hooks:

README.md

@@ -26,9 +26,23 @@ go build -o gibidify .
 ## Usage
 
 ```bash
-./gibidify -source <source_directory> -destination <output_file> [--prefix="..."] [--suffix="..."]
+./gibidify \
+  -source <source_directory> \
+  -destination <output_file> \
+  -format markdown|json|yaml \
+  -concurrency <num_workers> \
+  --prefix="..." \
+  --suffix="..."
 ```
 
+Flags:
+
+- `-source`: directory to scan.
+- `-destination`: output file path (optional; defaults to `<source>.<format>`).
+- `-format`: output format (`markdown`, `json`, or `yaml`).
+- `-concurrency`: number of concurrent workers.
+- `--prefix` / `--suffix`: optional text blocks.
+
 ## Docker
 
 A Docker image can be built using the provided Dockerfile:

main.go

@@ -130,7 +130,7 @@ func setDestination() error {
 }
 
 func startWorkers(ctx context.Context, wg *sync.WaitGroup, fileCh chan string, writeCh chan fileproc.WriteRequest) {
-	for range concurrency {
+	for i := 0; i < concurrency; i++ {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()