ci: added GitHub Actions (#366)

* ci: added dependabot

* ci: added greetings.yml

* ci: added json check action

* ci: updated greetings.yml

when a PR and issue will be creating these messages will be shown

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  # Update GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/greetings.yml

@@ -0,0 +1,19 @@
+name: Greetings
+
+on:
+  issues:
+    types: [opened]
+  pull_request:
+    types: [opened]
+
+jobs:
+  greeting:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Show Greetings Message
+        run: |
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            echo "Great job, ${{ github.actor }}! 🎉 Thank you for submitting your pull request in LinksHub. Your contribution is valuable and we appreciate your efforts to improve our project. We'll review your changes and provide feedback as soon as possible. Keep up the great work!"
+          elif [ "${{ github.event_name }}" = "issues" ]; then
+            echo "Hello, ${{ github.actor }}! 🎉 Thank you for creating a new issue in LinksHub. Your contribution is highly appreciated, and we are eager to collaborate with you to resolve the issue. Your hard work and dedication are commendable. Keep up the excellent work!"
+          fi

.github/workflows/jsoncheck.yml

@@ -0,0 +1,17 @@
+name: JSON check
+
+on:
+  push:
+    paths:
+      - "**.json"
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: json-syntax-check
+        uses: limitusus/json-syntax-check@v2
+        with:
+          pattern: "\\.json$"