feat: search template gallery

[Eric-Song-Nop]

Basic search template gallery by name.

Will update with fuzzy finder, and search by description later.

Might also be nice to have search and insert universe for packages also.

[Myriad-Dreamin]

I reimplemented it by using minisearch and indexing fields: ["name", "description", "authors", "keywords", "categories"]. The next missing feature is highlighting search terms in page. For example, when the input is "stu", the "students" word is highlighted in the description "All-in-one template for students and theses".

[Eric-Song-Nop]

I have accomplished the highlight in desc and title, with a yellow bg. While, it seems that matches in keywords/authors are hard to highlight(maybe not needed for now

[Myriad-Dreamin]

Wow, you made it like a flash.

I have accomplished the highlight in desc and title, with a yellow bg.

The yellow bg looks not 100% fit the dark themes, but should be already pretty nice.

While, it seems that matches in keywords/authors are hard to highlight(maybe not needed for now

We might highlight the whole boxes for them. For example, with entering "pres" page will show the "presentation" keyword box with a different foreground and background color at the same time.