[New feature] Add check shellscripts with status in main README

.editorconfig

@@ -0,0 +1,33 @@
+# EditorConfig is awesome: https://editorconfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.sh]
+# like -i=4
+indent_style = space
+indent_size = 4
+
+# --language-variant
+shell_variant      = posix
+binary_next_line   = true
+# --case-indent
+switch_case_indent = true
+space_redirects    = true
+keep_padding       = true
+# --func-next-line
+function_next_line = true
+
+[thirdparty/**]
+ignore = true
+
+[thirdparty_unman/**]
+ignore = true
+
+[android/gradlew]
+ignore = true

.github/workflows/check-shellscripts.yml

@@ -0,0 +1,41 @@
+name: check-shellscripts
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  shellcheck:
+    name: Check shellscripts by shellcheck
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository code
+        uses: actions/checkout@v4
+
+      - name: Check shellscripts by shellcheck
+        uses: ludeeus/[email protected]
+        with:
+          ignore_paths: >-
+            thirdparty
+            thirdparty_unman
+
+  shfmt:
+    name: Check shellscript formatting
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository code
+        uses: actions/checkout@v4
+
+      - name: Install Golang
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.22'
+          check-latest: true
+
+      - name: Install shfmt
+        run: go install mvdan.cc/sh/v3/cmd/shfmt@latest
+
+      - name: Check shellscripts by shfmt
+        run: shfmt -d .

README.md

@@ -21,6 +21,8 @@ Sourceforge repository will be used as a mirror
 [![Join the chat at https://gitter.im/coolreader/Lobby](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/coolreader/Lobby)
 
 
+[![shell-lint](https://github.com/buggins/coolreader/workflows/check-shellscripts/badge.svg?branch=master)](https://github.com/buggins/coolreader/actions?query=workflow%3Acheck-shellscripts+branch%3Amaster)
+
 
 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.