docs: fix url rewrite with clean urls

[ryanchristo]

Description

Navigating to https://docs.regen.network/modules/ directly rewrites the url to https://docs.regen.network/modules.html, which does not read the sidebar and breaks the links. This pull request adds a plugin to prevent this.

This pull request fixes the links but the content is not displayed correctly when navigating directly to modules or commands. I was unable to resolve the issue so opened a followup that would be nice to fix at a later point in time #1058.

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Author Checklist

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I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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• updated the relevant documentation or specification
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• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #1057 (3303a94) into master (ee54c46) will increase coverage by 0.05%.
The diff coverage is n/a.

❗ Current head 3303a94 differs from pull request most recent head 8e87ffd. Consider uploading reports for the commit 8e87ffd to get more accurate results

@@            Coverage Diff             @@
##           master    #1057      +/-   ##
==========================================
+ Coverage   68.86%   68.91%   +0.05%     
==========================================
  Files         222      222              
  Lines       21385    21385              
==========================================
+ Hits        14726    14738      +12     
+ Misses       5331     5315      -16     
- Partials     1328     1332       +4     

Flag	Coverage Δ
experimental-codecov	68.91% <ø> (+0.05%)	⬆️

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[ryanchristo]

Opened a follow up for content not being displayed correctly when navigating directly to modules and commands #1058

[clevinson]

Weirdly enough, sub-pages of modules still render as expected when linked to directly....

https://deploy-preview-1057--regen-ledger-docs.netlify.app/modules/ecocredit/

This seems like a fine solution for now. I don't think the formatting thing is worth blocking on. If I had any hesitation, it would be in bringing in a package that hasn't been updated in 2 years... but i think this is probably fine. Its a small workaround, and we can update again if the package gets out of date with vuepress.

[technicallyty]

lgtm!