refactor(cli): unify display of errors from Rust and JS

[bartlomieju]

Currently error formatting is different for errors originating from JS and Rust:

// JS
error: Uncaught URIError: relative import path "bad-module.ts" not prefixed with / or ./ or ../ Imported from "file:https:///Users/biwanczuk/dev/deno/cli/tests/error_011_bad_module_specifier.ts"

// Rust
Remote module are not allowed to statically import local modules. Use dynamic import instead.

This PR changes formatting so both errors are prefixed with red error::

// JS
error: Uncaught URIError: relative import path "bad-module.ts" not prefixed with / or ./ or ../ Imported from "file:https:///Users/biwanczuk/dev/deno/cli/tests/error_011_bad_module_specifier.ts"

// Rust
error: Remote module are not allowed to statically import local modules. Use dynamic import instead.

There is also question of diagnostics which have completely different formatting and display as:

error TS2339: Property 'loadavg' does not exist on type 'typeof Deno'.
console.log(Deno.loadavg);

I propose to change it to:

error: TS2339 [ERROR]: Property 'loadavg' does not exist on type 'typeof Deno'.
console.log(Deno.loadavg);

The [ERROR] describes the category of diagnostic (it can be also warn/debug/info).

EDIT: Already went ahead and did suggested change for diagnostics

[bartlomieju]

CC @ry @kitsonk

[ry]

LGTM