build: use import map for ts imports

[scarf005]

Purpose of change

simplifies version management for typescript files.

Describe the solution

used import map in typescript files for easier dependencies version control.

Additional Context

e.g

// before
import { walk } from "https://deno.land/[email protected]/fs/walk.ts"

// after
import { walk } from "$std/fs/walk.ts"

this makes updating version (e.g: 0.201.0 -> 0.206.0) across entire modules easier.

[chaosvolt]

I have zero experience with deno and typescript stuff so uh