feat: introduce Select Python Environment command and deprecate robotcode.python

See [here](https://github.com/microsoft/vscode-python/wiki/Setting-descriptions#pythondefaultinterpreterpath) for an explanation.

resolve #222

Author: d-biehl

package.json

@@ -440,8 +440,9 @@
           "robotcode.python": {
             "type": "string",
             "default": "",
-            "description": "Specifies the python executable to be used for RobotCode. If no path is specified, try to get it from \"python\" extension.",
-            "scope": "resource"
+            "markdownDescription": "Specifies the python executable to be used for RobotCode.\n\n**Note:** This is normally not necessary and should only be used if you want to use a completely different Python interpreter than the interpreter that can be selected via VSCode. Please use the `RobotCode: Select Python Environment` command to select the python interpreter.\n\nIf you want to define a default interpreter for your workspace use the `python.defaultInterpreterPath` setting. See [here](https://github.com/microsoft/vscode-python/wiki/Setting-descriptions#pythondefaultinterpreterpath) for an explanation.",
+            "scope": "resource",
+            "markdownDeprecationMessage": "This setting is deprecated in favor of using `python.defaultInterpreterPath`"
           }
         }
       },
@@ -1025,6 +1026,11 @@
         "category": "RobotCode",
         "command": "robotcode.reportIssue"
       },
+      {
+        "title": "Select Python Environment",
+        "category": "RobotCode",
+        "command": "robotcode.selectPythonEnvironment"
+      },
       {
         "title": "Clear Cache and Restart Language Servers",
         "category": "RobotCode",

vscode-client/languageToolsManager.ts

@@ -220,7 +220,7 @@ export class LanguageToolsManager {
       }),
       vscode.commands.registerCommand(
         "robotcode.selectPythonEnvironment",
-        async (folder?: vscode.WorkspaceFolder, showRetry?: boolean) => {
+        async (folder: vscode.WorkspaceFolder | undefined = undefined, showRetry: boolean = false) => {
           await this.languageClientsManager.selectPythonEnvironment(
             `Select Environment for workspace folder '${folder?.name}'`,
             folder,

vscode-client/languageclientsmanger.ts

@@ -341,6 +341,8 @@ export class LanguageClientsManager {
         break;
       case "retry":
         return;
+      default:
+        if (!showRetry) return;
     }
 
     if (folder !== undefined && !this.inselectPythonEnvironment) {