feat: Building code graph
Refactor to support import processing
Handle relative import name fixup
Add docs for code analysis framework
Update docs to include additional examples
feat: Function call graph
Update code graph to link function decl and calls
Include call node in function calls
feat: Flatten vulnerabilities in CSV reporter
refactor: Maintain separation of concerns for code analysis framework
refactor: Separate storage entities in its own package
feat: Add callback support in code graph builder
docs: Fix code analysis framework docs
Signed-off-by: abhisek <abhisek.datta@gmail.com>