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_ignore.lua

@@ -0,0 +1,20 @@
+-- mod-version:3
+
+local syntax = require "core.syntax"
+local style = require "core.style"
+local common = require "core.common"
+
+style.syntax["ignore"] = { common.color "#72B886" }
+style.syntax["exclude"] = { common.color "#F36161" }
+
+syntax.add {
+  name = ".ignore file",
+  files = { PATHSEP .. "%..*ignore$" },
+  comment = "#",
+  patterns = {
+    { regex = "^ *#.*$",            type = "comment" },
+    { regex = { "(?=^ *!.)", "$" }, type = "ignore"  },
+    { regex = { "(?=.)", "$" },     type = "exclude" },
+  },
+  symbols = {}
+}