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_ring.lua

@@ -0,0 +1,92 @@
+-- mod-version:3
+-- Refrence: https://ring-lang.github.io/doc1.21.2/syntaxflexibility.html
+
+local syntax = require "core.syntax"
+
+-- Keywords
+local keywords = {
+  "enablehashcomments", "disablehashcomments", "call", "class", "from", "get", "give",
+  "import", "load", "new", "package", "private", "changeringkeyword", "changeringoperator",
+  "loadsyntax", "endclass", "endpackage", "if", "but", "else", "elseif", "ok", "for",
+  "foreach", "to", "next", "catch", "step", "endfor", "while", "other", "end", "do",
+  "endwhile", "endswitch", "endtry", "try", "break", "bye", "continue", "default",
+  "endfunc", "endfunction", "return", "switch", "case", "on", "off", "again", "exit",
+  "loop", "done", "in", "func", "def", "nl"
+}
+
+-- Types using ring type hints library
+local types = {
+  "char", "unsigned", "signed", "int", "short", "long", "float", "double", "void",
+  "byte", "boolean", "string", "list", "number", "object", "public", "static",
+  "abstract", "protected", "override"
+}
+
+-- Special values
+local literals = {
+  "true", "false", "null"
+}
+
+-- Built-in functions
+local builtin_functions = {
+  "see", "put", "print"
+}
+
+local symbols = {}
+
+for _, keyword in ipairs(keywords) do
+  symbols[keyword:upper()] = "keyword"
+  symbols[keyword:gsub("^%l", string.upper)] = "keyword"
+  symbols[keyword] = "keyword"
+end
+
+for _, type in ipairs(types) do
+  symbols[type:upper()] = "keyword2"
+  symbols[type:gsub("^%l", string.upper)] = "keyword2"
+  symbols[type] = "keyword2"
+end
+
+for _, literal in ipairs(literals) do
+  symbols[literal:upper()] = "literal"
+  symbols[literal:gsub("^%l", string.upper)] = "literal"
+  symbols[literal] = "literal"
+end
+
+for _, func in ipairs(builtin_functions) do
+  symbols[func:upper()] = "function"
+  symbols[func:gsub("^%l", string.upper)] = "function"
+  symbols[func] = "function"
+end
+
+local string_syntax = {
+  patterns = {
+    { pattern = {"%#{", "}", "\\"},     type="keyword", syntax = ".ring" },
+    { pattern = "[^#\"`']+",            type = "string"},
+    { pattern = "[#\"`']",              type = "string"}
+  },
+  symbols = {}
+}
+
+syntax.add {
+  name = "Ring",
+  files = { "%.ring$", "%.rh$", "%.rform$" },
+  comment = "//",
+  patterns = {
+    { pattern = "#.*",                  type = "comment"  },
+    { pattern = "//.*",                 type = "comment"  },
+    { pattern = { "/%*", "%*/" },       type = "comment"  },
+    { pattern = { '"', '"', '\\' },     type = "string", syntax = string_syntax },
+    { pattern = { "'", "'", '\\' },     type = "string", syntax = string_syntax },
+    { pattern = { "`", "`", '\\' },     type = "string", syntax = string_syntax },
+    { pattern = "-?%d+[%d%.]*f?",       type = "number"   },
+    { pattern = "-?0x%x+",              type = "number"   },
+    { pattern = "[%+%-=/%*%^%%<>!~|&]", type = "operator" },
+    { pattern = "[%a_][%w_]*%f[(]",     type = "function" },
+    { pattern = "[Dd][Ee][Ff]()%s+()[%a_][%w_]*",         type = { "keyword", "normal", "function" } },
+    { pattern = "[Ff][Uu][Nn][Cc]()%s+()[%a_][%w_]*",     type = { "keyword", "normal", "function" } },
+    { pattern = "[Cc][Ll][Aa][Ss][Ss]()%s+()[%a_][%w_]*", type = { "keyword", "normal", "function" } },   
+    { pattern = "[%a_][%w_]*",          type = "symbol"   },
+    { pattern = "%?",                   type = "keyword"  },
+    { pattern = ":[%a_][%w_]*",         type = "literal"  },
+  },
+  symbols = symbols
+}