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_R.lua

@@ -0,0 +1,39 @@
+-- mod-version:3
+local syntax = require "core.syntax"
+
+syntax.add{
+  name = "R",
+  files = {"%.r$", "%.rds$", "%.rda$", "%.rdata$", "%.R$"},
+  comment = "#",
+  patterns = {
+    {pattern = {"#", "\n"}, type = "comment"},
+    {pattern = {'"', '"'}, type = "string"},
+    {pattern = {"'", "'"}, type = "string"},
+    {pattern = "[%a_][%w_]*%f[(]", type = "function"},
+    {pattern = "[%a_][%w_]*", type = "symbol"},
+    {pattern = "[%+%-=/%*%^%%<>!|&]", type = "operator"},
+    {pattern = "0x[%da-fA-F]+", type = "number"},
+    {pattern = "-?%d+[%d%.eE]*", type = "number"},
+    {pattern = "-?%.?%d+", type = "number"},
+  },
+  symbols = {
+    ["TRUE"] = "literal",
+    ["FALSE"] = "literal",
+    ["NA"] = "literal",
+    ["NULL"] = "literal",
+    ["Inf"] = "literal",
+    ["if"] = "keyword",
+    ["else"] = "keyword",
+    ["while"] = "keyword",
+    ["function"] = "keyword",
+    ["break"] = "keyword",
+    ["next"] = "keyword",
+    ["repeat"] = "keyword",
+    ["in"] = "keyword",
+    ["for"] = "keyword",
+    ["NA_integer"] = "keyword",
+    ["NA_complex"] = "keyword",
+    ["NA_character"] = "keyword",
+    ["NA_real"] = "keyword"
+  }
+}