Add profiler plugin for each platform

[tmarmer]

This PR adds the ProfilerDevtoolsPlugin, available at the core layer with wrappers on each platform.

• Tap into each of the core player hooks and collect timing information each time one is called.
  • Each hook call is assigned a ProfileNode which will have the start and end times, using the performance API when avialable, but defaulting to Date.now otherwise.
  • The value of each node is the total duration and is used by the flame-graph asset to determine the width of the bars it displays
  • The name is displayed on the graph and tooltip is displayed on hover
  • The children structure is inferred by when hooks are called, and is only needed for the flame-graph asset to render correctly.
    • Ideally we can group profiling data in a smarter way in the future and replace the current flame-graph with something that can better show the timings.
• The plugin has a step to transform the profiling data to work with the flame-graph asset by inserting spacers and removing anything with a value of 0
  • The spacers are needed as the asset left-aligns everything relative to its parent so the (work) spacers provide a way to show the reelative timing with which a hook started relative to the its parent
  • Anything with a value of 0 doesn't render anyway so removing those helps group a few spacers to clean up the ui.
• There is a rawData tab to show the profiling information without the transformation step.

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[tmarmer]

performance isn't available on the ios and kotlin integrations, so it's preferred for accuracy but Date.now still works.

[tmarmer]

This looks weird but it helps normalize the width of each bar on the graph to be 5px per millisecond. Since flame-graph doesn't show times this helps with at least seeing how long everything takes.