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_gmi.lua

@@ -0,0 +1,21 @@
+-- mod-version:3
+local syntax = require "core.syntax"
+
+
+
+syntax.add {
+  name = "Gemtext",
+  files = { "%.gmi$" },
+  patterns = {
+    { pattern = { "```", "```" },           type = "string"   },
+    { pattern = "#.*",                      type = "keyword"  },
+    { pattern = "%*%s",                     type = "keyword2" },
+    { pattern = "=>",                       type = "function" },
+    { pattern = "https?://%S+",             type = "literal"  },
+    { pattern = "gemini?://%S+",            type = "literal"  },
+    { pattern = ">.*",                      type = "comment"  },
+    { pattern = ".*[>*#]",                  type = "normal"   },
+    { pattern = ".*=>",                     type = "normal"   }
+  },
+  symbols = { },
+}