Modernize extension core infrastructure (#8)

* Modernize extension core infrastructure

- Update VS Code engine requirement to ^1.84.0 (Nov 2023)
- Add missing package.json metadata fields:
  - license (MIT)
  - galleryBanner for better marketplace appearance
  - badges for GitHub stars
  - sponsor link
  - qna marketplace support
- Improve .vscodeignore to reduce package size:
  - Exclude git and GitHub-related files
  - Exclude build artifacts and OS files
  - Exclude test and coverage directories
  - Exclude documentation files (viewable on GitHub)

* Update .vscodeignore

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: EndlessTrax

.vscodeignore

@@ -1,4 +1,13 @@
 .vscode/**
 .vscode-test/**
 .gitignore
+.gitattributes
+.git/**
+.github/**
 vsc-extension-quickstart.md
+**/*.map
+**/.DS_Store
+**/node_modules/**
+**/coverage/**
+**/test/**
+**/*.vsix

package.json

@@ -12,12 +12,28 @@
     ],
     "version": "1.3.0",
     "publisher": "RickyWhite",
+    "license": "MIT",
     "engines": {
-        "vscode": "^1.28.0"
+        "vscode": "^1.84.0"
     },
     "categories": [
         "Snippets"
     ],
+    "galleryBanner": {
+        "color": "#0d1117",
+        "theme": "dark"
+    },
+    "badges": [
+        {
+            "url": "https://img.shields.io/github/stars/EndlessTrax/python-template-snippets?style=social",
+            "href": "https://github.com/EndlessTrax/python-template-snippets",
+            "description": "Star on GitHub"
+        }
+    ],
+    "sponsor": {
+        "url": "https://github.com/sponsors/EndlessTrax"
+    },
+    "qna": "marketplace",
     "contributes": {
         "snippets": [
             {