Changed the value structure to not be flat

[evalott100]

Closes #138

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.76%. Comparing base (ee7d927) to head (3825c4b). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #139 +/- ## ========================================== + Coverage 91.67% 91.76% +0.08% ========================================== Files 8 8 Lines 1382 1396 +14 Branches 162 164 +2 ========================================== + Hits 1267 1281 +14 Misses 82 82 Partials 33 33 ```

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[evalott100]

This what we're looking for?

[:)] pvget PANDA1:PVI 
...
    structure pvi # Same as before
...
    structure value
        structure bits
            string d PANDA1:BITS:PVI
        structure[] calc
            (none)
            structure 
                string d PANDA1:CALC1:PVI
            structure 
                string d PANDA1:CALC2:PVI
        structure[] clock
            (none)
            structure 
                string d PANDA1:CLOCK1:PVI
            structure 
                string d PANDA1:CLOCK2:PVI
...

[coretl]

Please can we have a 0.11 release when this is in?