Replace Bytecode with GremlinLang in JavaScript GLV

[kirill-stepanishin]

As part of the TP4 migration, the server no longer accepts Bytecode and only processes Gremlin queries in script form.. This PR replaces Bytecode + Translator with a new GremlinLang class.

Changes

• New GremlinLang class that incrementally builds Gremlin query strings as steps are added
• GraphTraversalSource / GraphTraversal now accumulate into GremlinLang instead of Bytecode
• Client.submit() only accepts strings now; all queries sent as gremlin-lang language. OptionsStrategy extracted into RequestOptions (timeout, batchSize, bulkResults, etc.)
• Deleted Bytecode, Translator, BytecodeSerializer, and their tests
• Removed Bytecode serializers from both GraphSON and GraphBinary layers

Intentionally out of scope for this PR

• UUID — no UUID("...") wrapper; UUIDs fall through to String(arg)
• Numeric type suffixes (1B, 2S, 4L, 5.0F, 6.0D, etc.)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.82%. Comparing base (cfd6889) to head (ee834e1).
⚠️ Report is 791 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3307      +/-   ##
============================================
- Coverage     77.87%   75.82%   -2.05%     
+ Complexity    13578    13276     -302     
============================================
  Files          1015     1020       +5     
  Lines         59308    59864     +556     
  Branches       6835     7034     +199     
============================================
- Hits          46184    45391     -793     
- Misses        10817    11804     +987     
- Partials       2307     2669     +362     

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[Cole-Greer]

Overall I think this looks really good. Most of my comments are just for context and not anything which needs action in this PR, the rest are all for minor clarifications and tweaks.

[kenhuuu]

The overall design is similar to what has been done to the other GLVs for GremlinLang so my VOTE is +1, pending resolution of other comments.

[xiazcy]

Given JS doesn't distinguish the number types, I wonder if we should be identifying the numerical types in gremlin by asserting their sizes for adding the suffix instead of just turning it to string directly?

[Cole-Greer]

Numbers will be a giant mess here as there's no clear way to assume the users intent and map number into all of the TP numeric types. I expect we will need to accept some amount of precision loss and/or non-roundtripable types. My vote is to leave this for now and handle it separately. That topic alone can easily spawn many debates around handling subtle edge cases.

[xiazcy]

Overall I think this is a solid start for switching to GremlinLang in JS. There will be areas that needs follow-up changes, but I'm good to leave them out of this PR. VOTE +1

[Cole-Greer]

Thanks for the changes @kirill-stepanishin. LGTM

VOTE +1