feat(toolchain): start writing AST printers

[NoxHarmonium]

• This will be handy in the future for creating an opinionated formatter, but for now I just implemented the data part of the AST so that the tiledit program can use it to print out assembly generated from image data
• Did a massive refactor to make it so the parsers and the printers both depend on shared types but aren't coupled to each other
• Fixed an annoying bug where whitespace at the end of the file could cause the parser to fail

[codecov]

Codecov Report

Attention: Patch coverage is 80.75117% with 41 lines in your changes missing coverage. Please review.

Project coverage is 66.05%. Comparing base (0c5099b) to head (0f452cf).

Files	Patch %	Lines
sirc-vm/toolchain/src/parsers/shared.rs	85.29%	8 Missing and 2 partials ⚠️
sirc-vm/toolchain/src/parsers/data.rs	84.48%	7 Missing and 2 partials ⚠️
sirc-vm/toolchain/src/printers/data.rs	66.66%	9 Missing ⚠️
sirc-vm/toolchain/src/parsers/instruction.rs	76.00%	6 Missing ⚠️
sirc-vm/toolchain/src/printers/shared.rs	83.33%	5 Missing ⚠️
sirc-vm/toolchain/src/data/object.rs	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #266      +/-   ##
==========================================
+ Coverage   65.85%   66.05%   +0.19%     
==========================================
  Files          61       63       +2     
  Lines        5937     6018      +81     
  Branches     5686     5767      +81     
==========================================
+ Hits         3910     3975      +65     
- Misses       1873     1891      +18     
+ Partials      154      152       -2     

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