Add Portuguese translation (light version) (#111)

* fix(es): syntax error that prevented compilation

* feat(pt): add main text translation

* feat(pt): add tweets translation

* feat(pt): add PDF generation to GitHub workflow

* fix(pt): add misisng translations and formatting fixes

* fix(css): link fragment overlap with page header

* fix(css): add font Inter before Gothic A1

The Gothic A1 font lacks a few characters necessary for writing Portuguese, namely: á, í, ó, ú, ã, õ, and their upper case versions.

* fix(pt): remove 'Glossário' entry from _menu.hbs

* fix(build): slugify.js

* fix(pt): various typos and a few missing translations.

* chore: add .vscode to .gitignore

templates/language-menu.hbs

@@ -5,4 +5,5 @@
   <a href="/de/" class="{{#is page.lang 'de'}}active {{/is}}dropdown-item">Deutsch (German)</a>
   <a href="/hu/" class="{{#is page.lang 'hu'}}active {{/is}}dropdown-item">Magyar (Hungarian)</a>
   <a href="/pl/" class="{{#is page.lang 'pl'}}active {{/is}}dropdown-item">polski (Polish)</a>
+  <a href="/pt/" class="{{#is page.lang 'pt'}}active {{/is}}dropdown-item">Português (Portuguese)</a>
 </div>

templates/layout.hbs

@@ -49,6 +49,7 @@
   <link href="//fonts.googleapis.com/css?family=Sriracha:400" rel="stylesheet">
   <link href="//fonts.googleapis.com/css?family=Lato:100,200,300,400,700,800" rel="stylesheet">
   <link href="//fonts.googleapis.com/css?family=Roboto:300,400,600" rel="stylesheet">
+  <link href="//fonts.googleapis.com/css?family=Inter:300,400,600" rel="stylesheet">
   <link href="//fonts.googleapis.com/css?family=Gothic+A1:300,400,600" rel="stylesheet">
   {{#block "prescripts"}}
   <script type="text/javascript" src="{{rev '/js/global.js'}}" data-i-url="{{#prod}}//t.{{page.domain}}{{/prod}}/i"></script>