Add %par(ent)

[IanButterworth]

Closes #192

To keep the width additional minimal and to visually differentiate the different % columns this new column is just integer %'s which also makes sense because they will tend to be bigger % numbers.

julia> @timeit to "1" begin
               sleep(0.1)
               @timeit to "2" begin
                   sleep(0.1)
                   @timeit to "3" begin
                       sleep(0.1)
                   end
               end
           end

julia> to
────────────────────────────────────────────────────────────────────────────────
                              Time                          Allocations
                  ─────────────────────────────   ──────────────────────────────
Tot / % measured:         1.41s /  21.8%                 2.62MiB /   0.1%

Section   ncalls     time    %tot  %par     avg     alloc    %tot  %par      avg
────────────────────────────────────────────────────────────────────────────────
1              1    306ms  100.0%         306ms   3.19KiB  100.0%        3.19KiB
  2            1    204ms   66.7%   67%   204ms   1.64KiB   51.5%   51%  1.64KiB
    3          1    102ms   33.3%   50%   102ms      384B   11.8%   23%     384B
────────────────────────────────────────────────────────────────────────────────

@KristofferC what do you think? I can add tests & docs if you agree?

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.94%. Comparing base (ada4b6c) to head (75bb4eb).
Report is 15 commits behind head on master.

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Additional details and impacted files

@@             Coverage Diff             @@
##           master     #193       +/-   ##
===========================================
+ Coverage   84.82%   94.94%   +10.11%     
===========================================
  Files           5        6        +1     
  Lines         323      455      +132     
===========================================
+ Hits          274      432      +158     
+ Misses         49       23       -26     

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[IanButterworth]

Something else to consider: