Bundle curated community plugins (2.1.8-4)

Vendored from upstream, pinned by commit (see debian/extra/README.source):
- gitstatus, gitopen, fontconfig, open_ext, select_colorscheme,
  smoothcaret, nerdicons (font mapping patched to DATADIR, Ships the
  Symbols Nerd Font Mono TTF, SIL OFL 1.1)
- lite-xl-lsp (complete LSP client; idle until a language server is
  configured) plus the lite-xl-widgets library it requires
- 104 language syntax plugins (none duplicate the nine bundled in core)

settings GUI left out upstream is broken: it requires a
libraries.widget.fonts widget that does not exist in
lite-xl-widgets at any revision.

Co-developed-with: ZCode (Z.ai)

debian/extra/plugins/language_lox.lua

@@ -0,0 +1,34 @@
+-- mod-version:3
+local syntax = require 'core.syntax'
+
+syntax.add {
+	name = "Lox",
+	files = { "%.lox$" },
+	comment = "//",
+	patterns = {
+		{ pattern = "//.-\n",              type = "comment"  },
+		{ pattern = { '"', '"' },          type = "string"   },
+		{ pattern = "%a[%w_]*()%s*%f[(]",  type = {"function", "normal"} },
+		{ pattern = "[%a_][%w_]*%s*%f[(]", type = "function" },
+		{ pattern = "%d+%.?%d*",           type = "number"   },
+		{ pattern = "%a%w*",               type = "symbol"   },
+	},
+	symbols = {
+		["and"]    = "keyword",
+		["class"]  = "keyword",
+		["else"]   = "keyword",
+		["false"]  = "literal",
+		["for"]    = "keyword",
+		["fun"]    = "keyword",
+		["if"]     = "keyword",
+		["nil"]    = "literal",
+		["or"]     = "keyword",
+		["print"]  = "keyword",
+		["return"] = "keyword",
+		["super"]  = "keyword2",
+		["this"]   = "keyword2",
+		["true"]   = "keyword",
+		["var"]    = "keyword",
+		["while"]  = "keyword",
+	},
+}