Set up project scaffolding: GitHub Actions workflows, issue templates, changelog, contributing guidelines, MIT license, and README

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug
+about: Report a bug
+title: '[Bug] '
+labels: bug
+assignees: ''
+---
+
+**Description**
+Briefly: what is the problem?
+
+**Steps to reproduce**
+1. …
+2. …
+
+**Expected**
+What should happen?
+
+**Actual**
+What happens instead?
+
+**Environment**
+- OS:
+- Java version:
+- Terminal (e.g. PowerShell, CMD, IDE):
+
+**Optional: code snippet**
+```java
+// minimal example
+```

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+contact_links:
+  - name: Question / Discussion
+    url: https://github.com/jakubbbdev/terminal-ui/discussions
+    about: For questions and ideas without a concrete bug/feature ticket

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature
+about: Suggest an idea or enhancement
+title: ''
+labels: enhancement
+assignees: ''
+---
+
+**Problem / motivation**
+What is this about? What are you missing right now?
+
+**Proposal**
+What should be added or changed?
+
+**Alternatives**
+Have you considered other solutions?
+
+**Additional context**
+Screenshots, examples, links—feel free to attach.

.github/PULL_REQUEST_TEMPLATE.md

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+## Description
+
+<!-- Briefly: what does this PR do? -->
+
+## Type of change
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Refactoring / docs
+- [ ] Other
+
+## Checklist
+
+- [ ] `./gradlew build` passes locally
+- [ ] Relevant tests updated or added (if applicable)

.github/dependabot.yml

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+# Dependabot: automatic PRs for dependency updates
+# https://docs.github.com/en/code-security/dependabot
+
+version: 2
+updates:
+  # Gradle dependencies (build.gradle.kts, gradle-wrapper)
+  - package-ecosystem: "gradle"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 5
+    labels: ["dependencies"]
+    commit-message:
+      prefix: "deps"
+
+  # GitHub Actions (*.yml in .github/workflows)
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    labels: ["dependencies", "github-actions"]
+    commit-message:
+      prefix: "ci"

.github/workflows/codeql.yml

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+# CodeQL: static security analysis (free for public repos).
+name: CodeQL
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+  schedule:
+    - cron: '0 6 * * 1'
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      actions: read
+      contents: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: java
+
+      - name: Build (for CodeQL)
+        run: |
+          chmod +x gradlew
+          ./gradlew compileJava --no-daemon
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3

.github/workflows/dependency-review.yml

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+# On PRs: checks dependency changes for known vulnerabilities.
+# Useful when Dependabot or manual dependency updates are used in PRs.
+
+name: Dependency Review
+
+on:
+  pull_request:
+    branches: [main, master]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Dependency Review
+        uses: actions/dependency-review-action@v4

.github/workflows/release.yml

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+# On push of a version tag (e.g. v1.0.0): build, create GitHub Release, upload JARs.
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+          cache: gradle
+
+      - run: chmod +x gradlew && ./gradlew build --no-daemon
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true
+          files: build/libs/*.jar
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}