Feature/hozlucas28 automated checks

.github/actions/data.json

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+{
+	"languages": [
+		{
+			"fileExtension": "js",
+			"name": "JavaScript"
+		},
+		{
+			"fileExtension": "py",
+			"name": "Python"
+		}
+	]
+}

.github/actions/pull-requests/check-changed-and-modified-files/action.yml

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+author: 'hozlucas28'
+name: 'Check changed and modified files of a pull request'
+description: 'Check if changed and modified files of a pull request are valid'
+
+runs:
+  using: 'node20'
+  main: 'main.js'
+
+inputs:
+  changed-or-modified-files:
+    description: 'Changed and modified files of the pull request'
+    required: true
+
+outputs:
+  changed-or-modified-file:
+    description: 'Unique changed or modified file of the pull request'

.github/actions/pull-requests/check-changed-and-modified-files/main.js

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+const core = require('@actions/core')
+
+// Required data
+const changedAndModifiedFiles = core.getInput('changed-and-modified-files').split(' ')
+core.debug(`Changed and modified files: ${changedAndModifiedFiles}`)
+
+// Check if changed and modified files are valid
+const isValidFiles = changedAndModifiedFiles.length === 1
+
+if (isValidFiles) {
+	// On valid files, set the output
+	core.setOutput('changed-or-modified-file', changedAndModifiedFiles[0])
+} else {
+	// On invalid files, set the action as failed
+	core.setFailed(
+		'Pull request must change or modified exactly one file. ' +
+			'Please, check the pull request and try again. ' +
+			'If you think this is an error, please contact an administrator.'
+	)
+}