Add ability to open docs for builtin functions

package.json

@@ -68,7 +68,7 @@
 			},
 			{
 				"command": "godotTools.openTypeDocumentation",
-				"title": "Godot Tools: Open Type Documentation"
+				"title": "Godot Tools: Open Documentation"
 			},
 			{
 				"command": "godotTools.debugger.inspectNode",

src/lsp/GDScriptLanguageClient.ts

@@ -147,6 +147,13 @@ export default class GDScriptLanguageClient extends LanguageClient {
 		let decl: string = message.result["contents"].value;
 		decl = decl.split('\n')[0].trim();
 
+		const match = decl.match(/func (@?\w+)\.(\w+)\(/);
+		if (match) {
+			this.lastSymbolHovered = `${match[1]}.${match[2]}`;
+			set_context("typeFound", true);
+			return;
+		}
+
 		// strip off the value
 		if (decl.includes("=")) {
 			decl = decl.split("=")[0];

src/lsp/NativeDocumentManager.ts

@@ -56,12 +56,22 @@ export default class NativeDocumentManager extends EventEmitter {
 		register_command("listNativeClasses", this.list_native_classes.bind(this));
 	}
 
-	public request_documentation(symbolName: string) {
-		if (symbolName in this.native_classes) {
+	public request_documentation(symbol: string) {
+		if (symbol in this.native_classes) {
 			this.inspect_native_symbol({
-				native_class: symbolName,
-				symbol_name: symbolName,
+				native_class: symbol,
+				symbol_name: symbol,
 			});
+			return;
+		}
+
+		if (symbol.includes(".")) {
+			const parts = symbol.split(".");
+			this.inspect_native_symbol({
+				native_class: parts[0],
+				symbol_name: parts[1],
+			});
+			return;
 		}
 	}