LEDGER_ASSERT improvments and CX_ASSERT addition

[xchapron-ledger]

Description

Add some documentation for LEDGER_ASSERT
Allow printf like usage of LEDGER_ASSERT for error message
Minor cleanup on CX includes
Add CX_ASSERT macro

Changes include

• Bugfix (non-breaking change that solves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Tests
• Documentation
• Other (for changes that might not fit in any category)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3a12ddd) 60.42% compared to head (69c8890) 60.42%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #504   +/-   ##
=======================================
  Coverage   60.42%   60.42%           
=======================================
  Files          12       12           
  Lines        1660     1660           
=======================================
  Hits         1003     1003           
  Misses        657      657           

Flag	Coverage Δ
unittests	60.42% <ø> (ø)

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[xchapron-ledger]

EDIT: not used anymore, but we never know, it might be useful at some point?

For future, here is the script used to generate most of the PR (except includes and formatting):

for file in files:
    print("Working on:", file)

    with open(file, "r") as f:
        iterator = iter(f.readlines())

    with open(file, "w") as fout:
        line = next(iterator)
        while line:
            content = None

            if line.startswith("WARN_UNUSED_RESULT cx_err_t"):
                content = line
                while ";" not in content:
                    content += next(iterator)

            if content:
                fout.write(content)
                fout.write("\n")

                starters, params = content.split("(")

                # Extract params names and create a string with the list without the types
                assert params.endswith(");\n")
                params = params.replace(");\n", "")
                params_list = params.replace("\n", " ").replace("*", "").split(",")
                params_value = ", ".join([x.strip().split(" ")[-1] for x in params_list])

                # Extract func_name and create new_func_name
                func_name = starters.replace("\n", " ").split(" ")[-1]
                if func_name.endswith("_no_throw"):
                    new_func_name = func_name.replace("_no_throw", "_assert")
                else:
                    new_func_name = func_name + "_assert"

                fout.write(f"/**\n * @brief {func_name} version which doesn't return in case of failure.\n *\n * See #{func_name}\n */")
                fout.write("\n")

                fout.write("static inline void " + new_func_name + "(")
                fout.write(params)
                fout.write(")\n")

                fout.write("{\n")
                fout.write(f"    LEDGER_ASSERT({func_name}({params_value}) == CX_OK,\n")
                fout.write(f"                  \"{func_name}\");\n")
                fout.write("}\n")
            else:
                fout.write(line)

            try:
                line = next(iterator)
            except StopIteration:
                print("End of file")
                line = None