chore: add prek pre-commit hooks

Hooks: go build, goimports, golangci-lint, go vet.
Install with: prek install

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: crrow

.pre-commit-config.yaml

@@ -0,0 +1,29 @@
+repos:
+  - repo: local
+    hooks:
+      - id: go-build
+        name: go build
+        entry: go build ./...
+        language: system
+        pass_filenames: false
+        types: [go]
+
+      - id: goimports
+        name: goimports
+        entry: goimports -local github.com/rararulab/devkit -l -w
+        language: system
+        types: [go]
+
+      - id: golangci-lint
+        name: golangci-lint
+        entry: golangci-lint run --config .golangci.yml
+        language: system
+        pass_filenames: false
+        types: [go]
+
+      - id: go-vet
+        name: go vet
+        entry: go vet ./...
+        language: system
+        pass_filenames: false
+        types: [go]