refactor: rework internals and external api

This is a large rework of how the d2-style tool works in order to
simplify usage and allow for more flexible usage.

Notable changes:

- Removes lint-staged and removes automatically staging formatted files.

- Only runs checks when commiting by default to ensure consistency.

- Includes recommended ESLint rules in the default ESLint config.

- Includes a React project.

- Renames `setup` to `install` and adds a `--list-groups` option.
`install` is preferred to be able to pair it with an `uninstall` command
in the future.

- Adds command to use Prettier to format structured text files (html,
yaml, markdown, etc.).

- Uses `npx` internally to execute command binaries instead of relying
on the NodeJS API, this makes the entire code base a lot simpler to work
with and to add new commands.

- `check` and `apply` commands now accept a `--pattern` to match files.

- Uses `fast-glob` to grab all files that match a pattern, then filters
them against other parameters, e.g. if they are staged or if only a
single file is given.

BREAKING CHANGE: Removes LintStaged, renames `setup` to `install`,
removes `validate` command. Uses a different way to match files and
filters out results instead.

.browserslistrc

@@ -1,5 +1,5 @@
 > 0.5%
 last 2 versions
 Firefox ESR
-ie 11
+not ie 11
 not dead

.dependabot/config.yml

@@ -1,16 +1,16 @@
 version: 1
 
 update_configs:
-  - package_manager: "javascript"
-    directory: "/"
-    update_schedule: "daily"
-    version_requirement_updates: "increase_versions"
-    target_branch: "master"
-    automerged_updates:
-        - match:
-            dependency_name: "@dhis2/*"
-            dependency_type: "all"
-            update_type: "semver:minor"
-        - match:
-            dependency_type: "all"
-            update_type: "security:patch"
+    - package_manager: 'javascript'
+      directory: '/'
+      update_schedule: 'daily'
+      version_requirement_updates: 'increase_versions'
+      target_branch: 'master'
+      automerged_updates:
+          - match:
+                dependency_name: '@dhis2/*'
+                dependency_type: 'all'
+                update_type: 'semver:minor'
+          - match:
+                dependency_type: 'all'
+                update_type: 'security:patch'

.eslintrc.js

@@ -2,4 +2,8 @@ const { config } = require('./index.js')
 
 module.exports = {
     extends: [config.eslint],
+
+    env: {
+        es6: true,
+    },
 }

.huskyrc.js

@@ -1,7 +1,12 @@
+const tasks = arr => arr.join(' && ')
+
 module.exports = {
     hooks: {
         'commit-msg': './bin/d2-style commit check',
-        'pre-commit':
-            'yarn test && ./bin/d2-style validate --lint-staged-config .lint-stagedrc.js',
+        'pre-commit': tasks([
+            './bin/d2-style js check --staged',
+            './bin/d2-style text check --staged',
+        ]),
+        'pre-push': 'yarn test',
     },
 }