Whitelist/blacklist options for better performance with multicursors in large files

[nickpapoutsis]

When using multicursors in large files, the extension highlights every tag pair, like <product></product>. In large files this not only uses quite a lot of CPU/RAM but, more importantly, takes an extremely long amount of time (even minutes for huge files) and often causes the window to crash.

Suggested Enhancements:

• Multicursor Toggle: Introduce an option to enable or disable tag pair highlighting when using multicursors. This would help manage resource utilization more effectively.
• Selective File Type Activation: Implement the ability to activate or deactivate the extension based on file types. This could include a whitelist or blacklist feature, allowing users to specify which file types should use the extension.
• File Size and Line Thresholds: Allow users to set thresholds for activating the extension based on the number of lines or the file size, providing greater control over its behavior.
• Limit on Tag Highlights: Set a maximum number of tag pairs that the extension will highlight at any one time to prevent overwhelming the system.

These options, especially the last one, should easily fix/sidestep this issue.