chore: fixes, several improvements and refactorings (#2)

* chore: fixes

* chore: rubocop fixes, linting, etc.

* chore: switching to use `brew style` only

* chore: use `brew style` for linting, skip example formulae in ci.yml

* chore(lint): fixes, additions and tweaks

.pre-commit-config.yaml

@@ -0,0 +1,29 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+      - id: check-json
+      - id: check-merge-conflict
+      - id: detect-private-key
+
+  - repo: local
+    hooks:
+      - id: brew-style
+        name: Brew Style
+        entry: brew style --fix --reset-cache .
+        language: system
+        types: [ruby]
+        pass_filenames: false
+        require_serial: true
+        exclude: ^(docs/|vendor/|bin/|tmp/|\.git/|node_modules/)
+
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: v4.0.0-alpha.8
+    hooks:
+      - id: prettier
+        types_or: [css, javascript, json, yaml]
+        exclude: "^docs/"