Remove chrome_style & browser_style manifest keys

The chrome_style CSS stylesheet applied by Chrome to the options page is
now included directly in the extension's bundle, and injected into the
options page.

This change is done in preparation for Manifest Version 3, which doesn't
allow setting chrome_style to true:
https://source.chromium.org/chromium/chromium/src/+/master:extensions/common/api/extensions_manifest_types.json;l=94;drc=149f67d78acea93b3d4f28bcd8e594301e1fdb08

This change also moves the options resources to their own folder.

Change-Id: I88d74989b38053d2e137ff166ddcdc4e00489428
diff --git a/src/options/options.html b/src/options/options.html
new file mode 100644
index 0000000..dec47e2
--- /dev/null
+++ b/src/options/options.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Options</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <link rel="stylesheet" href="options.css">
+    <link rel="stylesheet" href="chrome_style/chrome_style.css">
+  </head>
+  <body>
+    <a href="https://gerrit.avm99963.com/plugins/gitiles/infinitegforums/+/master/docs/features.md" target="_blank" class="features-link">
+      <!--
+        Material Design Icon - action/help_outline
+         - LICENSE: Apache License Version 2.0
+         - Source: https://github.com/google/material-design-icons/
+         - Author: Google LLC
+      -->
+      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M0 0h24v24H0V0z" fill="none"/><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-4h2v2h-2zm1.61-9.96c-2.06-.3-3.88.97-4.43 2.79-.18.58.26 1.17.87 1.17h.2c.41 0 .74-.29.88-.67.32-.89 1.27-1.5 2.3-1.28.95.2 1.65 1.13 1.57 2.1-.1 1.34-1.62 1.63-2.45 2.88 0 .01-.01.01-.01.02-.01.02-.02.03-.03.05-.09.15-.18.32-.25.5-.01.03-.03.05-.04.08-.01.02-.01.04-.02.07-.12.34-.2.75-.2 1.25h2c0-.42.11-.77.28-1.07.02-.03.03-.06.05-.09.08-.14.18-.27.28-.39.01-.01.02-.03.03-.04.1-.12.21-.23.33-.34.96-.91 2.26-1.65 1.99-3.56-.24-1.74-1.61-3.21-3.35-3.47z"/></svg>
+    </a>
+    <form>
+      <div class="option"><input type="checkbox" id="list"> <label for="list" data-i18n="list"></label></div>
+      <div class="option"><input type="checkbox" id="thread"> <label for="thread" data-i18n="thread"></label></div>
+      <div class="option"><input type="checkbox" id="threadall"> <label for="threadall" data-i18n="threadall"></label></div>
+      <h4 data-i18n="enhancements"></h4>
+      <div class="option"><input type="checkbox" id="fixedtoolbar"> <label for="fixedtoolbar" data-i18n="fixedtoolbar"></label></div>
+      <div class="option"><input type="checkbox" id="redirect"> <label for="redirect" data-i18n="redirect"></label> <span class="experimental-label" data-i18n="experimental_label"></span></div>
+      <div class="option"><input type="checkbox" id="history"> <label for="history" data-i18n="history"></label></div>
+      <div class="option"><input type="checkbox" id="loaddrafts"> <label for="loaddrafts" data-i18n="loaddrafts"></label> <span class="experimental-label" data-i18n="experimental_label"></span></div>
+      <div class="option"><input type="checkbox" id="increasecontrast"> <label for="increasecontrast" data-i18n="increasecontrast"></label></div>
+      <div class="option"><input type="checkbox" id="stickysidebarheaders"> <label for="stickysidebarheaders" data-i18n="stickysidebarheaders"></label></div>
+      <div class="option"><input type="checkbox" id="ccdarktheme"> <label for="ccdarktheme" data-i18n="ccdarktheme"></label> <span class="experimental-label" data-i18n="experimental_label"></span></div>
+      <div class="option"><input type="checkbox" id="ccforcehidedrawer"> <label for="ccforcehidedrawer" data-i18n="ccforcehidedrawer"></label></div>
+      <div id="dragndrop-wrapper" class="option" hidden><input type="checkbox" id="ccdragndropfix"> <label for="ccdragndropfix" data-i18n="ccdragndropfix"></label></div>
+      <div class="option"><input type="checkbox" id="batchlock"> <label for="batchlock" data-i18n="batchlock"></label> <span class="experimental-label" data-i18n="experimental_label"></span></div>
+      <h4 data-i18n="profileindicator_header"></h4>
+      <div class="option"><input type="checkbox" id="profileindicator"> <label for="profileindicator" data-i18n="profileindicator"></label> <span class="experimental-label" data-i18n="experimental_label"></span></div>
+      <div class="option"><input type="checkbox" id="profileindicatoralt"> <label for="profileindicatoralt" data-i18n="profileindicatoralt"></label> <span class="experimental-label" data-i18n="experimental_label"></span></div>
+      <div class="option"><a href="https://gerrit.avm99963.com/plugins/gitiles/infinitegforums/+/refs/heads/master/docs/op_indicator.md" target="_blank" rel="noreferrer noopener" data-i18n="profileindicator_moreinfo"></a></div>
+      <div class="actions"><button id="save" data-i18n="save"></button></div>
+    </form>
+    <div id="save-indicator"></div>
+    <script src="common/common.js"></script>
+    <script src="options.js"></script>
+  </body>
+</html>