chore(kona/batcher): remove unused batcher crate

[theochap]

Summary

• Remove the unused kona-batcher-comp crate (crates/batcher/comp/) and all associated source files, examples, and documentation
• Clean up Cargo.toml workspace members and Cargo.lock references

Test plan

• CI passes with the crate removed
• No other crates depend on kona-batcher-comp

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.6%. Comparing base (6568a5e) to head (586ff86).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #18972      +/-   ##
===========================================
- Coverage     76.3%    75.6%    -0.7%     
===========================================
  Files          188      504     +316     
  Lines        10946    60582   +49636     
===========================================
+ Hits          8360    45847   +37487     
- Misses        2440    14735   +12295     
+ Partials       146        0     -146     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	?
unit	75.6% <ø> (?)

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see 692 files with indirect coverage changes

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[almanax-ai]

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