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_elm.lua

@@ -0,0 +1,49 @@
+-- mod-version:3
+local syntax = require "core.syntax"
+
+syntax.add {
+  name = "Elm",
+  files = { "%.elm$" },
+  comment = "%-%-",
+  patterns = {
+    { pattern = {"%-%-", "\n"},          type = "comment"  },
+    { pattern = { "{%-", "%-}" },        type = "comment"  },
+    { pattern = { '"', '"', '\\' },      type = "string"   },
+    { pattern = { '"""', '"""', '\\' },  type = "string"   },
+    { pattern = { "'", "'", '\\' },      type = "string"   },
+    { pattern = "-?0x%x+",               type = "number"   },
+    { pattern = "-?%d+[%d%.eE]*f?",      type = "number"   },
+    { pattern = "-?%.?%d+f?",            type = "number"   },
+    { pattern = "%.%.",                  type = "operator" },
+    { pattern = "[=:|&<>%+%-%*\\/%^%%]", type = "operator" },
+    { pattern = "[%a_'][%w_']*",         type = "symbol"   },
+  },
+  symbols = {
+    ["as"] = "keyword",
+    ["case"] = "keyword",
+    ["of"] = "keyword",
+    ["if"] = "keyword",
+    ["then"] = "keyword",
+    ["else"] = "keyword",
+    ["import"] = "keyword",
+    ["module"] = "keyword",
+    ["exposing"] = "keyword",
+    ["let"] = "keyword",
+    ["in"] = "keyword",
+    ["type"] = "keyword",
+    ["alias"] = "keyword",
+    ["port"] = "keyword",
+    ["and"] = "keyword",
+    ["or"] = "keyword",
+    ["xor"] = "keyword",
+    ["not"] = "keyword",
+    ["number"] = "keyword2",
+    ["Bool"] = "keyword2",
+    ["Char"] = "keyword2",
+    ["Float"] = "keyword2",
+    ["Int"] = "keyword2",
+    ["String"] = "keyword2",
+    ["True"] = "literal",
+    ["False"] = "literal",
+  },
+}