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/vim.go

@@ -0,0 +1,36 @@
+package styles
+
+import (
+	"github.com/alecthomas/chroma"
+)
+
+// Vim style.
+var Vim = Register(chroma.MustNewStyle("vim", chroma.StyleEntries{
+	chroma.Background:         "#cccccc bg:#000000",
+	chroma.Comment:            "#000080",
+	chroma.CommentSpecial:     "bold #cd0000",
+	chroma.Keyword:            "#cdcd00",
+	chroma.KeywordDeclaration: "#00cd00",
+	chroma.KeywordNamespace:   "#cd00cd",
+	chroma.KeywordType:        "#00cd00",
+	chroma.Operator:           "#3399cc",
+	chroma.OperatorWord:       "#cdcd00",
+	chroma.NameClass:          "#00cdcd",
+	chroma.NameBuiltin:        "#cd00cd",
+	chroma.NameException:      "bold #666699",
+	chroma.NameVariable:       "#00cdcd",
+	chroma.LiteralString:      "#cd0000",
+	chroma.LiteralNumber:      "#cd00cd",
+	chroma.GenericHeading:     "bold #000080",
+	chroma.GenericSubheading:  "bold #800080",
+	chroma.GenericDeleted:     "#cd0000",
+	chroma.GenericInserted:    "#00cd00",
+	chroma.GenericError:       "#FF0000",
+	chroma.GenericEmph:        "italic",
+	chroma.GenericStrong:      "bold",
+	chroma.GenericPrompt:      "bold #000080",
+	chroma.GenericOutput:      "#888",
+	chroma.GenericTraceback:   "#04D",
+	chroma.GenericUnderline:   "underline",
+	chroma.Error:              "border:#FF0000",
+}))