Add .editorconfig, .gitattributes, .vscode

Author: claui

.editorconfig

@@ -0,0 +1,32 @@
+# https://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[.gitattributes]
+indent_size = 16
+
+[*.{diff,patch}]
+end_of_line = lf
+trim_trailing_whitespace = false
+
+[Makefile*]
+indent_size = 4
+indent_style = tab
+
+[*.bash]
+end_of_line = lf
+indent_size = 2
+
+[*.{js,json}]
+indent_size = 2
+
+[*.md]
+indent_size = 2
+trim_trailing_whitespace = false

.gitattributes

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+# CAUTION:
+# Always run the following command after adding/editing an
+# `eol` entry:
+#
+#   git add --renormalize FILES_WITH_AFFECTED_EXTENSION
+#
+# This keeps existing files consistent with the new setting.
+#
+# Example:
+#
+#   git add --renormalize '*.foo' '*.bar'
+
+.editorconfig   text eol=lf
+.gitattributes  text eol=lf
+
+# LF required for interactive patching as of Git 2.17.1
+*.diff          text eol=lf
+*.patch         text eol=lf
+
+Makefile*       text eol=lf
+
+# LF required to allow shell scripts to run
+*.bash          text eol=lf
+
+*.json          text eol=lf
+*.md            text eol=lf

.vscode/extensions.json

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+{
+  "recommendations": [
+    "editorconfig.editorconfig",
+    "timonwong.shellcheck"
+  ]
+}

.vscode/settings.json

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+{
+  "files.exclude": {
+    "**/.git": true
+  },
+  "shellcheck.customArgs": [
+    "--external-sources"
+  ],
+  "shellcheck.useWorkspaceRootAsCwd": true
+}