Migrate to mini-SWE-agent v2

[john-b-yang]

Migrating CodeClash to use mini-SWE-agent with version 2.0 upgrades.

Key changes:

• mini-SWE-agent changes execute to take a dictionary of {"command": <action>}, whereas it formerly took a string. To minimize amount of changes to rest of codebase, a small ClashDockerEnvironment class was added that wraps the execute to take in either a string or a dictionary. string inputs are then cast into the dictionary format before being passed to the execute call of the underlying DockerEnvironment class defined by mini-SWE-agent.
• Solved some lingering small bugs (temp directory not working on AWS, work around for DeterministicModel)
• Update viewer to handle both v1 and v2 style mini-SWE-agent trajectories.
• Remove dangling trajectory.html
• Update pyproject, dependency versioning.

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[Muhtasham]

@john-b-yang I pushed a small follow-up on this branch to fix the mini-SWE-agent v2 model config migration:

• normalized the README-linked example configs from Portkey-style @provider/... names to LiteLLM provider names
• changed Gemini in configs/models.yaml from google/gemini-2.5-pro to gemini/gemini-2.5-pro
• kept PORTKEY_API_KEY documented in .env.example for legacy configs that still set model_class: portkey

Verified through the actual CodeClash mini-SWE-agent v2 import path: minisweagent.models.get_model(...) + LiteLLM provider resolution validated all 25 example/source-roster model names. Also reran local SCML/CybORG/dummy arena tests, and CI is green.

[Muhtasham]

Approved. I reviewed the mini-SWE-agent v2 migration and pushed a small follow-up fixing the model config names in the README-linked examples/source roster. Provider resolution was verified through the actual CodeClash mini-SWE-agent v2 path, local SCML/CybORG/dummy tests pass, and CI is green.

[john-b-yang]

You are amazing, thank you so much @Muhtasham, merging!