Improve description of ltex.ignoreRuleInSentence

See #31.

README.md

@@ -80,7 +80,7 @@ This extension contributes the following settings. Some settings are separated b
 * `ltex.markdown.dummy`: List of Markdown node types to be replaced by dummy words (i.e., `Dummy0`, `Dummy1`, etc.) by the Markdown parser. LT<sub>E</sub>X internally uses this mechanism for example for links and inline code that are part of the sentence structure and for which LanguageTool would throw an error if simply omitted from the checked text. The possible node types are listed at <https://javadoc.io/static/com.vladsch.flexmark/flexmark/0.60.2/com/vladsch/flexmark/ast/package-summary.html>.
   * Example/default: `["AutoLink", "Code"]`
 
-* `ltex.ignoreRuleInSentence`: Individual rule/sentence pairs to ignore, i.e., no diagnostics of the specified rule will be displayed for the specified sentence. Add sentences by using the `Ignore in this sentence` quick fix.
+* `ltex.ignoreRuleInSentence`: Individual rule/sentence pairs to ignore, i.e., no diagnostics of the specified rule will be displayed for the specified sentence. This is a list of objects with two keys each, `rule` and `sentence`. The `rule` value is the identifier of the LanguageTool rule to be ignored. The `sentence` value is a regular expression. All occurrences of the given rule are ignored in sentences (as determined by the LanguageTool tokenizer) that match the regular expression. Although it is possible to manually edit this setting, the intended way is to add rule/sentence pairs by using the `Ignore in this sentence` quick fix. If this list is very large, performance may suffer.
   * Example: `[{"rule": "THIS_NNS", "sentence": "^\\QThese error in this sentence should be ignored.\\E$"}]`; default: `[]`
 
 * `ltex.configurationTarget`: Controls which `settings.json` to update when using one of the quick fixes. `global` always updates the global configuration, while `workspace` updates the workspace configuration if currently in a workspace, otherwise the global configuration.

package.json

@@ -185,8 +185,8 @@
               }
             }
           },
-          "markdownDescription": "Individual rule/sentence pairs to ignore, i.e., no diagnostics of the specified rule will be displayed for the specified sentence. Add sentences by using the `Ignore in this sentence` quick fix.",
-          "description": "Individual rule/sentence pairs to ignore, i.e., no diagnostics of the specified rule will be displayed for the specified sentence. Add sentences by using the \"Ignore in this sentence\" quick fix."
+          "markdownDescription": "Individual rule/sentence pairs to ignore, i.e., no diagnostics of the specified rule will be displayed for the specified sentence. This is a list of objects with two keys each, `rule` and `sentence`. The `rule` value is the identifier of the LanguageTool rule to be ignored. The `sentence` value is a regular expression. All occurrences of the given rule are ignored in sentences (as determined by the LanguageTool tokenizer) that match the regular expression. Although it is possible to manually edit this setting, the intended way is to add rule/sentence pairs by using the `Ignore in this sentence` quick fix. If this list is very large, performance may suffer.",
+          "description": "Individual rule/sentence pairs to ignore, i.e., no diagnostics of the specified rule will be displayed for the specified sentence. This is a list of objects with two keys each, \"rule\" and \"sentence\". The \"rule\" value is the identifier of the LanguageTool rule to be ignored. The \"sentence\" value is a regular expression. All occurrences of the given rule are ignored in sentences (as determined by the LanguageTool tokenizer) that match the regular expression. Although it is possible to manually edit this setting, the intended way is to add rule/sentence pairs by using the \"Ignore in this sentence\" quick fix. If this list is very large, performance may suffer."
         },
         "ltex.configurationTarget": {
           "type": "object",