✨ Adds VSCode configuration files for extensions and settings

Introduces new extensions.json and settings.json files to recommend
useful VSCode extensions and configure JSON schemas, word wrap, and
default formatters for XML files. This enhances the development
environment for better productivity and consistency.

.github/copilot-commit-message-instructions.md

@@ -0,0 +1,19 @@
+Follow [gitmoji](https://gitmoji.dev) conventions. Use the **emoji character** (not the `:shortcode:`).
+
+## Format
+
+```
+<emoji> <imperative summary, third person>
+
+<longer explanation of what and why, wrap at 72 chars>
+
+<issue references, e.g. Closes #123, Fixes PROJ-456>
+```
+
+- Subject line under 72 characters.
+- Third-person imperative mood ("Adds feature", not "Add feature" or "Added feature").
+- Do not end the subject with a period.
+- Separate subject, body, and footer with blank lines.
+- Body and footer are **optional** — only include when the subject alone isn't self-explanatory or when issues need linking.
+- Body explains **what** changed and **why**.
+- Footer links related issues (GitHub `Closes #N` / Jira `PROJ-N`).