refactor: reach the master

[delphinus]

This adds commits from the master into the refactor branch #35 . Needs more tests to merge.

TODO

• [x] db_root option does not work.
• Type annotations have many errors.
  • I will fix this later in another PR.
• [x] auto_validate works validly?

Here is notes from #35 below. I will refactor more in another PR.

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Changes:

• Use sql.nvim new api to make data layer more readable.
• Move some files out telescope/_extentions/
• Create algo.lua: to be the place to store calculation or algorithms (idk feels wrong now)
• general refactoring

[delphinus]

Seems working now.

[sunjon]

Hi. I'm hopefully going to have time to show the plugins I wrote a bit more love now. Thanks for all the work - this looks great!. Give me a couple of days to try read through the changes and try it out.

[delphinus]

Now this takes over #35, so changes the target to master.

[delphinus]

I have been dog-fooding long time, and it seems safe to merge.

[delphinus]

I have been dog-fooding long time, and it seems safe to merge.

[delphinus]

I will merge this. Another refactoring is needed.

[delphinus]

I will merge this. Another refactoring is needed.