Add editor config and sonarcloud config

.editorconfig

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+# This file is for unifying the coding style for different editors and IDEs
+# editorconfig.org
+
+# WordPress Coding Standards
+# https://make.wordpress.org/core/handbook/coding-standards/
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = tab
+
+[*.yml]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[{*.txt,wp-config-sample.php}]
+end_of_line = crlf

sonar-project.properties

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+# General setup
+sonar.projectKey=alma_alma-woocommerce-gateway
+sonar.organization=almapay
+# Path is relative to the sonar-project.properties file. Replace "\" by "/" on Windows.
+sonar.sources=src/
+sonar.exclusions=src/.composer/**,src/.subversion/**,src/bin/**,src/build/**,src/languages/**,src/vendor/**,src/.phpcs.xml.dist,src/.phpunit.result.cache,src/phpcs.xml,src/phpunit.xml.dist,src/phpcs.xml
+# Test folders
+sonar.tests=src/tests/
+sonar.test.inclusions=src/tests/**/*
+# Encoding of the source code. Default is default system encoding
+sonar.sourceEncoding=UTF-8
+# Exclude files from coverage
+sonar.coverage.exclusions=src/tests/**/*