Upgrade language server version

To go along with the changes in the language server 0.4.0:
https://github.com/smithy-lang/smithy-language-server/blob/main/CHANGELOG.md#040-2024-07-30,
this commit also:
- updates coursier to use java 21 to run the server
- adds config options diagnostics.minimumSeverity, onlyReloadOnSave
- removes config option for logToFile

package.json

@@ -20,10 +20,6 @@
     "Programming Languages",
     "Snippets"
   ],
-  "activationEvents": [
-    "onLanguage:smithy",
-    "onCommand:smithy.runSelector"
-  ],
   "main": "./out/src/extension",
   "preview": true,
   "contributes": {
@@ -106,25 +102,33 @@
           "default": "verbose",
           "description": "Traces the communication between VS Code and the language server."
         },
-        "smithyLsp.logToFile": {
-          "scope": "window",
-          "type": "string",
-          "enum": [
-            "enabled",
-            "disabled"
-          ],
-          "default": "disabled",
-          "description": "Writes additional logging to .smithy.lsp.log file in workspace."
-        },
         "smithyLsp.version": {
           "scope": "window",
           "type": "string",
-          "default": "0.2.4",
-          "description": "Version of the Smithy LSP (see https://github.com/smithy-lang/smithy-language-server)"
+          "default": "0.4.0",
+          "description": "Version of the Smithy Language Server (see https://github.com/smithy-lang/smithy-language-server)."
         },
         "smithyLsp.rootPath": {
           "scope": "resource",
           "type": "string"
+        },
+        "smithyLsp.diagnostics.minimumSeverity": {
+          "scope": "window",
+          "type": "string",
+          "enum": [
+            "NOTE",
+            "WARNING",
+            "DANGER",
+            "ERROR"
+          ],
+          "default": "WARNING",
+          "description": "Minimum severity of Smithy validation events to display in the editor."
+        },
+        "smithyLsp.onlyReloadOnSave": {
+          "scope": "window",
+          "type": "boolean",
+          "default": false,
+          "description": "Whether to only re-load the Smithy model on save. Use this if the server feels slow as you type."
         }
       }
     }

src/extension.ts

@@ -68,6 +68,8 @@ export function activate(context: vscode.ExtensionContext) {
               let launchargs = [
                 "launch",
                 "software.amazon.smithy:smithy-language-server:" + version,
+                "--jvm",
+                "21",
                 "-r",
                 "m2local",
                 "-M",
@@ -179,11 +181,13 @@ function getClientOptions(): LanguageClientOptions {
     workspaceFolder,
 
     initializationOptions: {
-      logToFile: vscode.workspace.getConfiguration("smithyLsp").get("logToFile", "disabled"),
+      "diagnostics.minimumSeverity": vscode.workspace.getConfiguration("smithyLsp").get("diagnostics.minimumSeverity"),
+      onlyReloadOnSave: vscode.workspace.getConfiguration("smithyLsp").get("onlyReloadOnSave"),
     },
 
     // Don't switch to output window when the server returns output.
     revealOutputChannelOn: RevealOutputChannelOn.Never,
+    progressOnInitialization: true,
   };
 }