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_sass.lua

@@ -0,0 +1,47 @@
+-- mod-version:3
+local syntax = require "core.syntax"
+
+syntax.add {
+  name = "Sass",
+  files = { "%.sass$" ,"%.scss$"},
+  comment = "//",
+  patterns = {
+    { pattern = "/[/%*].-\n",             type = "comment"  },
+    { pattern = { '"', '"', '\\' },       type = "string"   },
+    { pattern = { "'", "'", '\\' },       type = "string"   },
+    { pattern = "$%w+",                   type = "keyword"  },
+    { pattern = "@%w+",                   type = "literal"  },
+    { pattern = "[#,]%w+",                type = "function" },
+    { pattern = "&",                      type = "keyword2" },
+    { pattern = "[:%/%*%-]",              type = "operator" },
+    { pattern = "[%a][%w-]*%s*%f[:]",     type = "keyword2" },
+    { pattern = "-?%d+[%d%.]*p[xt]",      type = "number"   },
+    { pattern = "-?%d+[%d%.]*deg",        type = "number"   },
+    { pattern = "-?%d+[%d%.]*[s%%]",      type = "number"   },
+    { pattern = "-?%d+[%d%.]*",           type = "number"   },
+    { pattern = "[%a_][%w_]*",            type = "symbol"   },
+  },
+  symbols = {
+    ["transparent"] = "literal",
+    ["none"]        = "literal",
+    ["absolute"]    = "literal",
+    ["relative"]    = "literal",
+    ["solid"]       = "literal",
+    ["flex"]        = "literal",
+    ["flex-start"]  = "literal",
+    ["flex-end"]    = "literal",
+    ["row"]         = "literal",
+    ["center"]      = "literal",
+    ["column"]      = "literal",
+    ["pointer"]     = "literal",
+    ["ease"]        = "literal",
+    ["white"]      = "function",
+    ["black"]      = "function",
+    ["gray"]       = "function",
+    ["blue"]       = "function",
+    ["red"]        = "function",
+    ["purple"]     = "function",
+    ["green"]      = "function",
+    ["yellow"]     = "function"
+  }
+}