feat: add .node-version and .nvmrc support (#341)

Co-authored-by: JounQin <[email protected]>

Author: JoshuaKGoldberg

.changeset/gorgeous-ladybugs-push.md

@@ -0,0 +1,5 @@
+---
+"prettier-plugin-sh": minor
+---
+
+feat: add `.node-version` and `.nvmrc` support

packages/sh/test/__snapshots__/fixtures.spec.ts.snap

@@ -22,6 +22,16 @@ node_modules
 "
 `;
 
+exports[`parser and printer > should format all fixtures > .nvmrc 1`] = `
+"v1.2.3
+"
+`;
+
+exports[`parser and printer > should format all fixtures > .nvmrc 2`] = `
+"v1.2.3
+"
+`;
+
 exports[`parser and printer > should format all fixtures > .properties 1`] = `
 "# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
 # yarn lockfile v1

packages/sh/test/fixtures/.nvmrc

@@ -0,0 +1 @@
+v1.2.3

scripts/languages.ts

@@ -27,6 +27,13 @@ const EXTRA_SH_LANGUAGES: SupportLanguage[] = [
     filenames: ['.env.*'],
     vscodeLanguageIds: ['dotenv'],
   },
+  {
+    name: 'nvmrc',
+    since: '0.14.0',
+    parsers: ['sh'],
+    extensions: ['.node-version', '.nvmrc'],
+    filenames: ['.node-version', '.nvmrc'],
+  },
 ]
 
 const getSupportLanguages = (