feat: add link to browse files on github

Closes: #35
Signed-off-by: Arthur Zamarin <arthurzam@gentoo.org>

Author: idealseal

pkg/app/handler/packages/overview.templ

@@ -452,6 +452,12 @@ templ overview(pkg *models.Package) {
 							Git repository browser
 						</a>
 					</dd>
+					<dd>
+						<span class="fa fa-fw fa-github"></span>
+						<a href={ templ.URL("https://github.com/gentoo/gentoo/tree/master/" + pkg.Atom) } target="_blank">
+							GitHub repository browser
+						</a>
+					</dd>
 					<dd>
 						<span class="fa fa-fw fa-history"></span>
 						<a href={ templ.URL("https://gitweb.gentoo.org/repo/gentoo.git/log/" + pkg.Atom + "?showmsg=1") } title="Git log" target="_blank">Git log</a>