chore: drop proto packages

[sgammon]

Summary

Drops all of Elide's packages under packages/proto, since they were gross and unused anyway; consolidates generated protobuf code into graalvm so it can be accessed by that module and server (it is still in use by VFS).

Changelog

chore: move protobuf plugin and related wiring to `graalvm` module
chore: move generated protobufs to `graalvm` module
chore: drop all `proto-*` packages from project

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.47%. Comparing base (adbbb99) to head (177c644).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1239      +/-   ##
==========================================
+ Coverage   52.17%   53.47%   +1.29%     
==========================================
  Files         435      435              
  Lines       17531    17531              
  Branches     3136     3137       +1     
==========================================
+ Hits         9147     9374     +227     
+ Misses       7354     7110     -244     
- Partials     1030     1047      +17     

Flag	Coverage Δ
jvm	53.47% <ø> (+1.29%)	⬆️
lib	53.47% <ø> (+1.29%)	⬆️

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see 17 files with indirect coverage changes

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