Add js/ts.implicitProjectConfig.strict setting for implicit projects

- Add strict property to ImplicitProjectConfiguration class
- Update inferredProjectCompilerOptions to handle strict setting
- Add configuration setting to package.json with default true
- Add localization string for the new setting
- Create unit tests for the new functionality

This enables strict mode by default in implicit JS/TS projects, aligning with TS 6.0.

Co-authored-by: mjbvz <12821956+mjbvz@users.noreply.github.com>

extensions/typescript-language-features/package.json

@@ -302,6 +302,12 @@
             "markdownDescription": "%configuration.implicitProjectConfig.strictFunctionTypes%",
             "scope": "window"
           },
+          "js/ts.implicitProjectConfig.strict": {
+            "type": "boolean",
+            "default": true,
+            "markdownDescription": "%configuration.implicitProjectConfig.strict%",
+            "scope": "window"
+          },
           "typescript.tsc.autoDetect": {
             "type": "string",
             "default": "on",