fix(fmt): make printf working with colors.

[keelii]

printf is not working well with colors package.

➜  ent-std git:(master) ✗ cat test.ts  
import { printf } from "jsr:@std/fmt/printf";
import {underline} from "jsr:@std/fmt/colors";

printf("a: %7s|\n", underline("foo"))
printf("b: %7s|\n", underline("foo bar"))
➜  ent-std git:(master) ✗ deno run -A test.ts
a: foo|
b: foo bar|

Add stripAnsiCode in Printf.fmtString maybe solve this problem.

➜  std git:(feat/make_printf_working_with_colors) ✗ cat test.ts  
import {printf} from "./fmt/printf.ts";
import {underline} from "./fmt/colors.ts";

printf("a: %7s|\n", underline("foo"))
printf("b: %7s|\n", underline("foo bar"))
➜  std git:(feat/make_printf_working_with_colors) ✗ deno run -A test.ts
a:     foo|
b: foo bar|

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.35%. Comparing base (6c96a0c) to head (3f162c7).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6360   +/-   ##
=======================================
  Coverage   96.34%   96.35%           
=======================================
  Files         552      552           
  Lines       41939    41944    +5     
  Branches     6357     6358    +1     
=======================================
+ Hits        40408    40415    +7     
+ Misses       1491     1489    -2     
  Partials       40       40           

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[kt3k]

Looks reasonable to me