refactor(ast): rename value types to Number/Decimal/Text/Boolean

Renamed AST value types for v0.3 naming convention:
- Value::Int -> Value::Number
- Value::Float -> Value::Decimal
- Value::String -> Value::Text
- Value::Bool -> Value::Boolean
- Expr::IntLit -> Expr::NumberLit
- Expr::FloatLit -> Expr::DecimalLit
- Expr::StringLit -> Expr::TextLit
- Expr::BoolLit -> Expr::BooleanLit

Updated all references across parser, resolver, validator, LSP,
query engine, tests, and editor.

src/lsp/completion.rs

@@ -209,10 +209,10 @@ fn is_typing_declaration_name(text: &str, offset: usize) -> bool {
 fn format_value_type(value: &Value) -> String {
     match value {
         | Value::Identifier(path) => path.join("."),
-        | Value::String(_) => "String".to_string(),
-        | Value::Int(_) => "Int".to_string(),
-        | Value::Float(_) => "Float".to_string(),
-        | Value::Bool(_) => "Bool".to_string(),
+        | Value::Text(_) => "Text".to_string(),
+        | Value::Number(_) => "Number".to_string(),
+        | Value::Decimal(_) => "Decimal".to_string(),
+        | Value::Boolean(_) => "Boolean".to_string(),
         | Value::List(items) => {
             if items.is_empty() {
                 "List".to_string()