Improvement: Support for search operators

For example:

• Currently, when I use the """ character on Lemmy search, it searches posts/comments with only the """ on them.

My lemmy search improvement requests:

• "hello world" should strictly show comments/posts matching Hello World, case insensitive by default (with case-sensitive check box)
  • like: "Hello Everyone" shows posts/comments with the phrase "hello everyone" on them but not "hello" and/or "everyone"
• -${KEYWORD} or -${COMMUNITY} excludes a specific keyword or community from the search result. Using -"Hello World" filters results with the phrase "Hello World" on them. If it's a community like -"community@lemmy.instance", it will exclude the community from the results.
• * asterisks - wildcard
• | pipe - logical OR search.