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.