roles/aurweb: Add the cgitrc template

Added the template for the cgitrc configuration file.

roles/aurweb/templates/cgitrc.j2

+virtual-root=/cgit/
+clone-prefix=https://{{ aurweb_domain }}
+noheader=0
+favicon=/images/favicon.ico
+logo=
+css=/css/cgit.css
+snapshots=tar.gz
+readme=:README.md
+readme=:README
+enable-index-owner=0
+enable-index-links=1
+enable-switch-form=0
+noplainemail=1
+
+cache-root=/var/cache/cgit-aurweb
+cache-size=0
+cache-dynamic-ttl=15
+cache-repo-ttl=15
+cache-root-ttl=60
+cache-scanrc-ttl=120
+cache-static-ttl=60
+
+root-title=AUR Package Repositories
+root-desc=Web interface to the AUR Package Repositories
+header={{ aurweb_dir }}/web/template/cgit/header.html
+footer={{ aurweb_dir }}/web/template/cgit/footer.html
+max-repodesc-length=50
+max-blob-size=2048
+max-stats=year
+enable-http-clone=1
+source-filter=/usr/lib/cgit-aurweb/filters/syntax-highlighting.sh
+
+repo.url=aur.git
+repo.path={{ aurweb_dir }}/aur.git
+repo.desc=AUR Package Repositories