Custom text hotkey

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2

UPD.
Just found a solution.
Plugin Hotkeys++
Edit main.js inside the plugin folder
Add secton:

	this.addCommand({
        id: 'tbookmarks',
        name: 'Task bookmarks',
        callback: function () { return _this.tbookmark(); },
        hotkeys: [
            {
                modifiers: ['Mod', 'Shift'],
                key: 'b',
            },
        ],
    });

and

HotkeysPlus.prototype.tbookmark = function () {
	var view = this.app.workspace.getActiveViewOfType(obsidian.MarkdownView);
	if (!view) return;

	var editor = view.editor;

	// Вставляем текст
	var textToInsert = "- [b] "; // Замените на нужный текст
	var cursor = editor.getCursor();
	editor.replaceRange(textToInsert, cursor);
	editor.setCursor(cursor.line, cursor.ch + textToInsert.length);
};

Now you can add text - [b] to any place by Ctrl+Shift+b
You can modify main.js as you wish