feat: prepared buffers

[Julusian]

The aim of this is to better support users who want to do rapid drawing of the same buffers, such as to achieving flashing or gif behaviour.

This is a performance optimisation by allowing them to 'prepare' a draw, which does all the buffer preparation and jpeg encoding necessary, and then repeatedly send the draw when wanted much cheaper than before.

The prepared buffer can be optionally made json safe, where the buffers will be encoded as a string at the cost of requiring it to be decoded each time it is drawn

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 21.73913% with 72 lines in your changes missing coverage. Please review.

Project coverage is 35.71%. Comparing base (7fdbe37) to head (820cf35).

Files with missing lines	Patch %	Lines
packages/core/src/preparedBuffer.ts	11.11%	14 Missing and 2 partials ⚠️
...ckages/core/src/services/lcdSegmentDisplay/plus.ts	14.28%	11 Missing and 1 partial ⚠️
...ges/core/src/services/buttonsLcdDisplay/default.ts	52.17%	11 Missing ⚠️
packages/core/src/models/base.ts	9.09%	9 Missing and 1 partial ⚠️
packages/core/src/proxy.ts	0.00%	8 Missing ⚠️
packages/tcp/src/index.ts	0.00%	6 Missing ⚠️
...kages/core/src/services/buttonsLcdDisplay/pedal.ts	0.00%	4 Missing ⚠️
packages/webhid/src/index.ts	0.00%	3 Missing ⚠️
...ackages/core/src/services/lcdSegmentDisplay/neo.ts	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #102      +/-   ##
==========================================
- Coverage   36.55%   35.71%   -0.84%     
==========================================
  Files          51       52       +1     
  Lines        1625     1705      +80     
  Branches      215      234      +19     
==========================================
+ Hits          594      609      +15     
+ Misses       1031     1015      -16     
- Partials        0       81      +81     

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