'trex' not found about trex HOT 7 CLOSED

advanced package management for deno, based on import_map.json

USAGE:
   trex [OPTIONS] [SUBCOMMAND]

OPTIONS:
   -h, --help      print help info
   -c, --custom    install custom package
   -v, --version   print version
   -m, --map       install package from deno.land
   -n, --nest      install package from nest.land
   -p, --pkg       install package from some repository

SUBCOMMANDS:
   [install or i]  install a package
   delete          delete a package
   upgrade         update trex
   tree            view dependency tree
   run             run a script alias in a file run.json
   setup           create a deno configuration for your IDE
   purge           remove a package or url from cache
   ls              shows the list of installed packages

you can see the different options available for each command using:
   trex  [command] --help or -h

// scripts/plugin-name/main.ts
import {
  assert,
  assertEquals,
  assertThrowsAsync,
} from "testing/asserts.ts";
import { exists } from "fs/mod.ts";
...

Check file:///home/rildev/Projects/olivetan/$deno$test.ts
error: TS2305 [ERROR]: Module '"deno:///missing_dependency.d.ts"' has no exported member 'assert'.
  assert,
  ~~~~~~
    at file:///home/rildev/Projects/olivetan/scripts/modernize-transcript/tests/main.test.ts:2:3

TS2305 [ERROR]: Module '"deno:///missing_dependency.d.ts"' has no exported member 'assertEquals'.
  assertEquals,
  ~~~~~~~~~~~~
    at file:///home/rildev/Projects/olivetan/scripts/modernize-transcript/tests/main.test.ts:3:3

TS2305 [ERROR]: Module '"deno:///missing_dependency.d.ts"' has no exported member 'assertThrowsAsync'.
  assertThrowsAsync,
  ~~~~~~~~~~~~~~~~~
    at file:///home/rildev/Projects/olivetan/scripts/modernize-transcript/tests/main.test.ts:4:3

TS2305 [ERROR]: Module '"deno:///missing_dependency.d.ts"' has no exported member 'exists'.
import { exists } from "fs/mod.ts";
         ~~~~~~
    at file:///home/rildev/Projects/olivetan/scripts/modernize-transcript/tests/main.test.ts:6:10

Found 4 errors.

// .vscode/settings.json
{
    "deno.enable": true,
    "deno.import_map": "./import_map.json",
    "deno.unstable": true
}

// import_map.json
{
  "imports": {
    "fs/": "https://deno.land/std/fs/",
    "testing/": "https://deno.land/std/testing/"
  }
}