LaTeX autocomplete

The LaTeX Auto-Completion Plugin provides a basic autocomplete feature for LaTeX commands while editing notes. When users type a backslash followed by a partial command, the plugin offers relevant suggestions, streamlining the process of writing LaTeX within markdown files. Though currently limited to simple completions, it lays the groundwork for more sophisticated input assistance. Planned enhancements include intelligent shortcuts that expand shorthand expressions like '\a/b' into full LaTeX commands such as '\frac{a}{b}', potentially improving speed and accuracy for users writing complex math expressions.