readline: avoid painting default prompt before prompt()

[Tseian]

Issue

#12606

Description

Track whether prompt() has been invoked and whether the configured prompt
is still the documented default. Until then, skip the default prefix when
redrawing the line or computing cursor position, fixing inconsistent
appearance after keys that refresh the line (see issue #12606).

Set the same flag when tab completion redraws the line so behavior matches
prior releases. Document that callers should call prompt() from a line
listener when they want a prompt on each new line (REPL already does).

Before

'use strict';

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
});

rl.on('line', (line) => {
  console.log(line);
});

It does not use rl.prompt() anywhere and with a common input there will be no default prompt.
However, if a user press DELETE, BACKSPACE or UP button. For example default prompt immediately and somehow unexpectedly appears shifting the whole line when I click UP button.

a
a
> a

After

Default prompt will not appear again.

a
a
a

[codecov]

Codecov Report

❌ Patch coverage is 92.30769% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.55%. Comparing base (7e3c244) to head (700207b).
⚠️ Report is 148 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/internal/readline/interface.js	92.30%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #62525      +/-   ##
==========================================
- Coverage   89.70%   89.55%   -0.15%     
==========================================
  Files         694      706      +12     
  Lines      214216   218147    +3931     
  Branches    41108    41685     +577     
==========================================
+ Hits       192160   195362    +3202     
- Misses      14109    14683     +574     
- Partials     7947     8102     +155     

Files with missing lines	Coverage Δ
lib/internal/readline/interface.js	91.47% <92.30%> (-5.88%)	⬇️

... and 170 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.