Python Support (wip)

[UnidayStudio]

Hi! Thanks for the text editor, I appreciated it and I'm using in my game engine that works by embedding python.

I had to write some code in order to support this language (Python) so I decided to share it here to contribute somehow.

The code is not complete and unfortunatelly I don't know regex to properly do the mTokenRegexStrings part so I just copied this snippet from the HLSL code. That's why I'm opening an issue instead of a formal contribution (pr on the dev branch).

Again, thank you for the editor!

		static LanguageDefinition langDef;

		static const char* const keywords[] = {
			"False", "None", "True", "and", "as", "assert", "break", "class", 
			"continue", "def", "del", "elif", "else", "except", "finally", 
			"for", "from", "global", "if", "import", "in", "is", "lambda", 
			"nonlocal", "not", "or", "pass", "raise", "return", "try", "while", 
			"with", "yield",
			"__class__", "__delattr__", "__dict__", "__dir__", "__doc__", "__eq__", 
			"__format__", "__ge__", "__getattribute__", "__gt__", "__hash__", 
			"__init__", "__le__", "__lt__", "__module__", "__ne__", "__new__", 
			"__reduce__", "__reduce_ex__", "__repr__", "__setattr__", "__sizeof__", 
			"__str__", "__subclasshook__", "__weakref__"
		};

		for (auto& k : keywords) langDef.mKeywords.insert(k);

		static const char* const identifiers[]{
			"abs", "delattr", "hash", "memoryview", "set", "all", "dict", "help", 
			"min", "setattr", "any", "dir", "hex", "next", "slice", "ascii", "divmod", 
			"id", "object", "sorted", "bin", "enumerate", "input", "oct",
			"staticmethod", "bool", "eval", "int", "open", "str", "breakpoint", 
			"exec", "isinstance", "ord", "sum", "bytearray", "filter", "issubclass", 
			"pow", "super", "bytes", "float", "iter", "print", "tuple", "callable", 
			"format", "len", "property", "type", "chr", "frozenset", "list", "range",
			"vars", "classmethod", "getattr", "locals", "repr", "zip", "compile", 
			"globals", "map", "reversed", "__import__", "complex", "hasattr", "max", 
			"round"
		};

		for (auto& k : identifiers)	{
			Identifier id;
			id.mDeclaration = "Built-in function";
			langDef.mIdentifiers.insert(std::make_pair(std::string(k), id));
		}

		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("[ \\t]*#[ \\t]*[a-zA-Z_]+", PaletteIndex::Preprocessor));
		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("L?\\\"(\\\\.|[^\\\"])*\\\"", PaletteIndex::String));
		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("\\'\\\\?[^\\']\\'", PaletteIndex::CharLiteral));
		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)([eE][+-]?[0-9]+)?[fF]?", PaletteIndex::Number));
		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("[+-]?[0-9]+[Uu]?[lL]?[lL]?", PaletteIndex::Number));
		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("0[0-7]+[Uu]?[lL]?[lL]?", PaletteIndex::Number));
		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("0[xX][0-9a-fA-F]+[uU]?[lL]?[lL]?", PaletteIndex::Number));
		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("[a-zA-Z_][a-zA-Z0-9_]*", PaletteIndex::Identifier));
		langDef.mTokenRegexStrings.push_back(std::make_pair<std::string, PaletteIndex>("[\\[\\]\\{\\}\\!\\%\\^\\&\\*\\(\\)\\-\\+\\=\\~\\|\\<\\>\\?\\/\\;\\,\\.]", PaletteIndex::Punctuation));

		langDef.mCommentStart = R"(""")";
		langDef.mCommentEnd = R"(""")";
		langDef.mSingleLineComment = "#";

		langDef.mCaseSensitive = true;
		langDef.mAutoIndentation = true;

		langDef.mName = "Python";