apply the provided column information to the highlighting
This applies the provided information from Cppcheck and improves the highlighting.
Example:
<error id="returnDanglingLifetime" severity="error" msg="Returning pointer that will be invalid when returning." verbose="Returning pointer that will be invalid when returning." cwe="562" file0="C:/Users/Username/AppData/Local/Temp/FGuuaiWE_test.cpp">
<location file="C:\Users\Username\AppData\Local\Temp\FGuuaiWE_test.cpp" line="5" column="9"/>
<location file="C:\Users\Username\AppData\Local\Temp\FGuuaiWE_test.cpp" line="4" column="37" info="Pointer to container is created here."/>
</error>
Before:

After:

This might look a bit strange. Here's how Cppcheck displays it:
/mnt/s/clion/example_lite_3/test.cpp:5:9: error: Returning pointer that will be invalid when returning. [returnDanglingLifetime]
return c;
^
/mnt/s/clion/example_lite_3/test.cpp:4:37: note: Pointer to container is created here.
const char* c = std::string().c_str();
^
/mnt/s/clion/example_lite_3/test.cpp:5:9: note: Returning pointer that will be invalid when returning.
return c;
^
Just highlighting the column in question might be too subtle. It might make more sense to limit it to the token and it looks like the Document offers that but I wonder how consistent that would be. The end of the affected code could also be provided by Cppcheck but that would require upstream changes.
We should only highlight the token in question. We could try to determine this information ourselves (I think the Document even offers a function for that).
Or Cppcheck could offer the information in the output. I filed a ticket about offering this information: https://trac.cppcheck.net/ticket/12250.