feat: added editorconfig, markdownlint, pre-commit config, gitignore

.editorconfig

@@ -0,0 +1,29 @@
+# SPDX-FileCopyrightText: 2023 Tobias Schmidl
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+indent_style = tabs
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.{yaml,yml}]
+indent_size = 2
+indent_style = space
+
+[*.{cpp,hpp,h}]
+indent_size = 2
+
+[{CMakeLists.txt,*.cmake}]
+indent_style = tabs
+
+[*.md]
+indent_size = 2