Add a new setting 'java.signatureHelp.description.enabled' (#2404)

* Add 'New' section in README

Signed-off-by: sheche <sheche@microsoft.com>

Author: jdneo

README.md

@@ -120,6 +120,7 @@ The following settings are supported:
 * `java.referencesCodeLens.enabled` : Enable/disable the references code lenses.
 * `java.implementationsCodeLens.enabled` : Enable/disable the implementations code lenses.
 * `java.signatureHelp.enabled` : Enable/disable signature help support (triggered on `(`).
+* `java.signatureHelp.description.enabled` : Enable/disable to show the description in signature help. Defaults to `false`.
 * `java.contentProvider.preferred` : Preferred content provider (see 3rd party decompilers available in [vscode-java-decompiler](https://github.com/dgileadi/vscode-java-decompiler)).
 * `java.import.exclusions` : Exclude folders from import via glob patterns. Use `!` to negate patterns to allow subfolders imports. You have to include a parent directory. The order is important.
 * `java.import.gradle.enabled` : Enable/disable the Gradle importer.
@@ -201,6 +202,8 @@ The following settings are supported:
  * `java.import.generatesMetadataFilesAtProjectRoot` : Specify whether the project metadata files(.project, .classpath, .factorypath, .settings/) will be generated at the project root. Defaults to `false`.
  * `java.inlayHints.parameterNames.enabled`: Enable/disable inlay hints for parameter names. Supported values are: `none`(isable parameter name hints), `literals`(Enable parameter name hints only for literal arguments) and `all`(Enable parameter name hints for literal and non-literal arguments). Defaults to `literals`.
 
+New in 1.6.0:
+* `java.signatureHelp.description.enabled`: Enable/disable to show the description in signature help. Defaults to `false`.
 
 Semantic Highlighting
 ===============

package.json

@@ -328,6 +328,12 @@
           "description": "Enable/disable the signature help.",
           "scope": "window"
         },
+        "java.signatureHelp.description.enabled": {
+          "type": "boolean",
+          "default": false,
+          "description": "Enable/disable to show the description in signature help.",
+          "scope": "window"
+        },
         "java.implementationsCodeLens.enabled": {
           "type": "boolean",
           "default": false,