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/vs.go

@@ -0,0 +1,23 @@
+package styles
+
+import (
+	"github.com/alecthomas/chroma"
+)
+
+// VisualStudio style.
+var VisualStudio = Register(chroma.MustNewStyle("vs", chroma.StyleEntries{
+	chroma.Comment:           "#008000",
+	chroma.CommentPreproc:    "#0000ff",
+	chroma.Keyword:           "#0000ff",
+	chroma.OperatorWord:      "#0000ff",
+	chroma.KeywordType:       "#2b91af",
+	chroma.NameClass:         "#2b91af",
+	chroma.LiteralString:     "#a31515",
+	chroma.GenericHeading:    "bold",
+	chroma.GenericSubheading: "bold",
+	chroma.GenericEmph:       "italic",
+	chroma.GenericStrong:     "bold",
+	chroma.GenericPrompt:     "bold",
+	chroma.Error:             "border:#FF0000",
+	chroma.Background:        " bg:#ffffff",
+}))