Added richer support for analyzing C projects with Clang parser as requested in Issue #79

This initial version is able to create a symbol table for C projects with the following attributes:

1. CApplication

   class CApplication(BaseModel):
    """Represents a complete C application.
   
    Attributes:
        translation_units (Dict[str, CTranslationUnit]): All source files
        call_graph (List[CCallGraphEdge]): Function call relationships
    """
   
    translation_units: Dict[str, CTranslationUnit]
    call_graph: List[CCallGraphEdge] = []

   class CTranslationUnit(BaseModel):
    """Represents a C source file.
   
    Attributes:
        file_path (str): Path to the source file
        includes (List[str]): Header files included
        macros (List[CMacro]): Macro definitions
        typedefs (List[CTypedef]): Typedef declarations
        structs (List[CStruct]): Struct/union declarations
        enums (List[CEnum]): Enum declarations
        globals (List[CVariable]): Global variable declarations
        functions (Dict[str, CFunction]): Function declarations/definitions
        is_header (bool): Whether this is a header file
    """
   
    file_path: str
    includes: List[CInclude] = []
    macros: List[CMacro] = []
    typedefs: List[CTypedef] = []
    structs: List[CStruct] = []
    enums: List[CEnum] = []
    globals: List[CVariable] = []
    functions: Dict[str, CFunction] = {} # <-----[ Initial version has been implemented ]-----
    is_header: bool = False
    is_modified: bool = False