Use glamour and termev to render/colorize content (#181)

Merge branch 'master' into use-glamour

select Glamour Theme based on BackgroundColor

Merge branch 'master' into use-glamour

Merge branch 'master' into use-glamour

update termev

update go.mod

label color colorate

use glamour for issue content

Vendor: Add glamour

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/181
Reviewed-by: techknowlogick <techknowlogick@gitea.io>
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>

vendor/github.com/alecthomas/chroma/styles/igor.go

@@ -0,0 +1,16 @@
+package styles
+
+import (
+	"github.com/alecthomas/chroma"
+)
+
+// Igor style.
+var Igor = Register(chroma.MustNewStyle("igor", chroma.StyleEntries{
+	chroma.Comment:       "italic #FF0000",
+	chroma.Keyword:       "#0000FF",
+	chroma.NameFunction:  "#C34E00",
+	chroma.NameDecorator: "#CC00A3",
+	chroma.NameClass:     "#007575",
+	chroma.LiteralString: "#009C00",
+	chroma.Background:    " bg:#ffffff",
+}))