Small linkedlist lib in C

TODOs

• nicer Makefile
• Move to Scons or other build systems, if required, in future -- not required at present
• libcheck unit testing -- not used anymore
• use gtest for unit testing
• check memleaks, etc. with valgrind
• code coverage report generation with gcov
• upload code coverage report on github pages
• doxygen documentation
• upload on github with proper commit messages
• use -g gcc debugging option for use with gdb
• config file for code-formatting
• revisit codes several times, each time you will get something which can be done in a better way (performance, readability, or style)
  • while revisiting the code, we can write documentation, and log lines
• I don't like OBJS variable to be at one place, can be spread across multiple Makefiles
• I don't like the #include "module/inc/module.h" style now, "inc" word is redundant
• struct tags should not start with _, infact any identifier shouldn't start with leading _
• list can have a struct ListInstance which gives the user functions by which they can insert/delete/update/find/etc in the list
• log level lines instead of printf()s for debugging
• I have changed my style from char *var to char* var, also changed curly braces to start on the same line (unless it is a function defintion)
• fix github CI unit test
• cache github CI workflow/environment so that it doesn't install valgrind etc. on every push
• Separate debug bin build (compiled with -g) process and release bin build process
• Add description about project instead of tasks list on README

Dependencies

Document somehow that these are dependencies and need to be installed (or make a script that checks for and installs these dependencies)

• valgrind
• check testing framework lib
• lcov
• gcovr