add arc-green theme

[lutinglt]

No description provided.

[lsd-techno]

@lutinglt You would need to create chroma/dark.css and codemirror/dark.css in gitea/custom/public/assets/css/ to implement syntax highlighting in file view and edit.

$GITEA_CUSTOM/public/assets/css/
├── theme-arc-green-updated.css
├── theme-gitea-auto.css          (if used)
├── chroma/
│   └── dark.css
└── codemirror/
    └── dark.css

[lutinglt]

@lutinglt You would need to create chroma/dark.css and codemirror/dark.css in gitea/custom/public/assets/css/ to implement syntax highlighting in file view and edit.

$GITEA_CUSTOM/public/assets/css/
├── theme-arc-green-updated.css
├── theme-gitea-auto.css          (if used)
├── chroma/
│   └── dark.css
└── codemirror/
    └── dark.css

gitea-github-theme/themes/arcGreen.ts

Lines 355 to 397 in c793c5e

	export const arcGreenSyntax: Syntax = {
	keyword: "#ff7540",
	bool: "#649bc4",
	control: "#ffaa10",
	name: "#fabd2f",
	type: "#ff7b72",
	number: "#649bc4",
	operator: "#ff7540",
	regexp: "#9075cd",
	string: "#b8bb26",
	comment: "#777e94",
	invalid: "#ff4433",
	link: themeVars.color.primary.self,
	tag: "#ff7540",
	attribute: "#fabd2f",
	property: "#a0cc75",
	variable: "#ebdbb2",
	stringSpecial: "#ffaa10",
	escape: "#ff8540",
	entity: "#fabd2f",
	preproc: "#8ec07c",
	preprocFile: "#649bc4",
	decorator: "#8ec07c",
	namespace: "#c9d1d9",
	namePseudo: "#fabd2f",
	commentSpecial: "#9075cd",
	text: "#c9d1d9",
	textAlt: "#b6bac5",
	punctuation: "#d2d4db",
	whitespace: "#7f8699",
	diffFg: "#ffffff",
	deletedBg: "#5f3737",
	insertedBg: "#3a523a",
	emph: "#ddee30",
	strong: "#ebdbb2",
	heading: "#ffaa10",
	subheading: "#b8bb26",
	output: "#777e94",
	prompt: "#ebdbb2",
	traceback: "#ff7540",
	matchingBracketBg: "#00918a48",
	nonmatchingBracketBg: "#cc484848",
	};

This paragraph defines the syntax highlight used for editing and previewing, I remember it was around Gitea 1.26 or 1.27?

When switching back from Monaco to CodeMirror6, Gitea defined a set of syntax highlighting variable colors for both preview and editing, which is currently working well.

[lutinglt]

@lsd-techno You can download the compiled theme here and see the actual effect. 😄

https://github.com/lutinglt/gitea-github-theme/actions/runs/38846437987