Create submit your business page

[Robertg761]

Summary

• add a dedicated translated submit-business template for merchants who want free visibility
• route the Getting Started visibility CTA to the new page
• add the requested visibility link from the Bitcoin for Businesses page
• add submit-business URL slugs for all current languages so localized pages do not generate broken links

Notes

I saw #4721 after starting from the issue. This PR is intentionally a fuller implementation: it avoids a hard-coded /en/submit-business link, uses translated strings, adds the business-page link requested in the issue discussion, and uses the current directory/map services already referenced on the Spending Bitcoin page.

Testing

• ruby -e 'require "yaml"; Dir["_translations/*.yml"].each { |f| YAML.load_file(f) }; puts "yaml ok"'\n- ruby -e 'require "yaml"; missing=[]; Dir["_translations/*.yml"].each do |f| lang=File.basename(f,".yml"); data=YAML.load_file(f).fetch(lang); missing << [lang,"url"] unless data.dig("url","submit-business") == "submit-business"; end; abort(missing.inspect) unless missing.empty?; puts "submit-business route present for #{Dir["_translations/*.yml"].size} languages"'\n- ruby -e 'require "yaml"; en=YAML.load_file("_translations/en.yml")["en"]; %w[title pagetitle summary local-map local-map-text online-search online-search-text business-directory business-directory-text show-bitcoin show-bitcoin-text].each { |k| abort("missing #{k}") unless en["submit-business"][k].is_a?(String) && !en["submit-business"][k].empty? }; puts "submit-business English strings present"'\n- git diff --check\n\nFull bundle install / Jekyll build could not be run locally because this machine has Ruby 2.6.10 while the Gemfile pins Ruby 2.5.8.\n\nCloses Create custom page for "Submit your business" #1583

[Robertg761]

Bounty payout address for this submission, if PR #4726 is merged for issue #1583: 17ovQWiPzWroaDf8yh3kVQkyhT1pBG87fo