Create a RegExp tool in Editor Toolbar

[irmod]

@damionx7, could you please create a RegExp tool in Editor Toolbar

The RegExp tool should allow execute the rule:

1. to the selection, or
2. to the whole text of the note, if nothing is highlighted.

The tool should support the implementation of the chain of the rules in several passes.

The tool should support the features Backup and Restore in the json-file regexp_20250925_234554.json.

The tool may look like a Text Snippets tool in Editor Toolbar.

For the RegExp tool icon in the Editor Toolbar, I used the "Regular Expression" image

Here are a pair of examples of rules that I regularly use:

• Find more than one empty string and replace it with one empty string:

(^\s*\n){2,}

$1

• Replacing two or more spaces between a list marker and the beginning of the text in it:

(\s*\d+\.|\s*[-+*])[^\S\r\n]+

$1 

In the Obsidian Linter Plugin you can see more examples