major changes

- Added documentation via mdbook
- Created basic VS code extension
- Implemented if else blocks and changed some syntax
- fixed some issues

docs/book.toml

@@ -0,0 +1,14 @@
+[book]
+authors = ["tototomate123"]
+language = "en"
+src = "src"
+title = "Rush Documentation"
+description = "Documentation for the Rush experimental scripting language"
+
+[output.html]
+git-repository-url = "https://github.com/yourusername/rush"
+edit-url-template = "https://github.com/yourusername/rush/edit/main/docs/{path}"
+
+[output.html.playground]
+editable = false
+copyable = true