Add new and missing icons

[replete]

This PR includes fixes for:

• 4 cancelled icon

• 5 dependency icons

• 6 reminder icon

• 7 onComplete checkered flag icon

• 8 postpone/edit icons

In addition:

• Add location map pin icon
• Update README
  • added 'incomplete' to the non-lucide icon sets and hidden the screenshots.
  • reasoning: These sets were ugly and originally an example of using another set. NotoEmoji involved extracting vectors from binary variable font files (complex workflow) and was missing some icons, and emojitwo is also missing some icons. Lucide works well out of the box for this scenario. Lucide works pretty well for a replacement library, but ultimately someone with design skills could make a proper Tasks icon set.. maybe one day
• Updated screenshots

[replete]

Hi @claremacrae, hope you are well.

I've been procrastinating my duties today so picked up some issues to help things along.

When you get a chance let me know if you're happy with this to be merged.

While I'm at it, let me know if there are any other icons to squeeze in here so at least have a complete lucide set.

Phil

[claremacrae]

Thanks Phil.

I'm not going to be able to test this out for a week or two. Do you want me to just go ahead and merge it anyway?