refactor: re-layput project

- move assets (raw jsons, icons, meshes and i18n data) into the root of repo.
- move script into the root of repo.
- modify blender manifest according to this changes.
- optimize gitignore.

scripts/simple_po.py

@@ -0,0 +1,99 @@
+import typing
+import io
+import datetime
+
+class PoWriter():
+    """
+    The simple PO file writer.
+    This class is just served for writing POT files.
+    It may be convenient when exporting PO file for thoese whose format can not be parsed by formal tools.
+    """
+
+    __cEscapeCharsDict: typing.ClassVar[dict[str, str]] = {
+        '\\': '\\\\',
+        '"': '\\"',
+        '\n': '\\n',
+        '\t': '\\t',
+    }
+    __cEscapeCharsTable: typing.ClassVar[dict] = str.maketrans(__cEscapeCharsDict)
+    __mPoFile: io.TextIOWrapper
+
+    def __init__(self, po_file_path: str, project_name: str):
+        # open file
+        self.__mPoFile = open(po_file_path, 'w', encoding = 'utf-8')
+        # add default header
+        self.__add_header(project_name)
+
+    def __enter__(self):
+        return self
+    
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.close()
+    
+    def close(self) -> None:
+        self.__mPoFile.close()
+
+    def __write_line(self, val: str) -> None:
+        self.__mPoFile.write(val)
+        self.__mPoFile.write('\n')
+
+    def __escape_str(self, val: str) -> str:
+        """
+        This function escapes a given string to make it safe to use as a C++ string literal.
+        @param[in] val Original string
+        @return Escaped string
+        """
+        return val.translate(PoWriter.__cEscapeCharsTable)
+
+    def __add_header(self, project_name: str) -> None:
+        """
+        Add default header for PO file.
+        @param[in] project_name The project name written in file.
+        """
+        now_datetime = datetime.datetime.now()
+        self.__write_line('# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.')
+        self.__write_line('msgid ""')
+        self.__write_line('msgstr ""')
+        self.__write_line(f'"Project-Id-Version: {self.__escape_str(project_name)}\\n"')
+        self.__write_line(f'"POT-Creation-Date: {now_datetime.strftime("%Y-%m-%d %H:%M%Z")}\\n"')
+        self.__write_line('"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\\n"')
+        self.__write_line('"Last-Translator: FULL NAME <EMAIL@ADDRESS>\\n"')
+        self.__write_line('"Language-Team: LANGUAGE <LL@li.org>\\n"')
+        self.__write_line('"Language: __POT__\\n"')
+        self.__write_line('"MIME-Version: 1.0\\n"')
+        self.__write_line('"Content-Type: text/plain; charset=UTF-8\\n"')
+        self.__write_line('"Content-Transfer-Encoding: 8bit\\n"')
+        self.__write_line('"X-Generator: simple_po.PoWriter\\n"')
+
+    def add_entry(self, msg: str, msg_context: str | None = None, extracted_comment: str | None = None, reference: str | None = None) -> None:
+        """
+        @brief Write an entry into PO file with given arguments.
+        @details
+        Please note this function will NOT check whether there already is a duplicated entry which has been written.
+        You must check this on your own.
+        @param[in] msg The message string need to be translated.
+        @param[in] msg_context The context of this message.
+        @param[in] extracted_comment The extracted comment of this message. None if no reference. Line breaker is not allowed.
+        @param[in] reference The code refernece of this message. None if no reference. Line breaker is not allowed.
+        """
+        # empty string will not be translated
+        if msg == '': return
+
+        # write blank line first
+        self.__write_line('')
+        if extracted_comment:
+            self.__write_line(f'#. {extracted_comment}')
+        if reference:
+            self.__write_line(f'#: {reference}')
+        if msg_context:
+            self.__write_line(f'msgctxt "{self.__escape_str(msg_context)}"')
+        self.__write_line(f'msgid "{self.__escape_str(msg)}"')
+        self.__write_line('msgstr ""')
+
+    def build_code_reference(self, code_file_path: str, code_line_number: int) -> str:
+        """
+        A convenient function to build code reference string used when adding entry.
+        @param[in] code_file_path The path to associated code file.
+        @param[in] code_line_number The line number of associated code within given file.
+        """
+        return f'{code_file_path}:{code_line_number}'