Don't strip index.html from external links

Bug description

This issue was previously reported at #8852 but was not actually resolved. A change was made at https://github.com/quarto-dev/quarto-cli/pull/8853

Simply, /index.html in the following link will be replaced, which is not okay.

https://api.visitorbadge.io/api/visitors?path=https://github.com/index.html

The issue is still the same: https://github.com/quarto-dev/quarto-cli/blob/e29433f77b684d231e86d844e5d43d4df7a9c655/src/resources/projects/website/navigation/quarto-nav.js#L277

const links = window.document.querySelectorAll("a");
    for (let i = 0; i < links.length; i++) {
      if (links[i].href) {
        links[i].dataset.originalHref = links[i].href;
        links[i].href = links[i].href.replace(/\/index\.html/, "/");
      }
    }

There are two issues:

• .replace(/\/index\.html/, "/") replaces /index.html anywhere in the link, not just the end of the string

"https://github.com/index.html#diff".replace(/\/index\.html/, "/") => 'https://github.com/#diff'
"https://github.com/index.html/diff".replace(/\/index\.html/, "/") => 'https://github.com//diff'

• const links = window.document.querySelectorAll("a"); selects all links. It should probably avoid links with certain class, or attributes, eg:

// Exclude links with data-exclude attribute
document.querySelectorAll('a:not([data-exclude])')

Steps to reproduce

No response

Expected behavior

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Actual behavior

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Your environment

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Quarto check output

Quarto 1.5.57
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.2.0: OK
      Dart Sass version 1.70.0: OK
      Deno version 1.41.0: OK
      Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.5.57
      Path: /opt/quarto/bin

[✓] Checking tools....................OK
      TinyTeX: (external install)
      Chromium: (not installed)

[✓] Checking LaTeX....................OK
      Using: TinyTex
      Version: 2024

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.10.12
      Jupyter: 5.7.2
      Kernels: python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........(None)

      Unable to locate an installed version of R.
      Install R from https://cloud.r-project.org/