Add new environments and enhance tool context functionality

- Introduced new environments: Terminal Test Environment and SWE Environment, each with default configurations for testing and software engineering tasks.
- Added TerminalBench 2.0 evaluation environment with comprehensive setup for agentic LLMs, including task execution and verification.
- Enhanced ToolContext with methods for uploading and downloading files, ensuring binary-safe operations.
- Updated documentation across environments to reflect new features and usage instructions.
- Refactored existing environment configurations for consistency and clarity.

environments/benchmarks/terminalbench_2/run_eval.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Terminal-Bench 2.0 Evaluation
+#
+# Run from repo root:
+#   bash environments/benchmarks/terminalbench_2/run_eval.sh
+#
+# Override model:
+#   bash environments/benchmarks/terminalbench_2/run_eval.sh \
+#       --openai.model_name anthropic/claude-sonnet-4
+#
+# Run a subset:
+#   bash environments/benchmarks/terminalbench_2/run_eval.sh \
+#       --env.task_filter fix-git,git-multibranch
+
+mkdir -p logs evals/terminal-bench-2
+LOG_FILE="logs/terminalbench2_$(date +%Y%m%d_%H%M%S).log"
+
+echo "Terminal-Bench 2.0 Evaluation"
+echo "Log: $LOG_FILE"
+echo ""
+
+export TERMINAL_ENV=modal
+export TERMINAL_TIMEOUT=300
+
+python environments/benchmarks/terminalbench_2/terminalbench2_env.py evaluate \
+  --config environments/benchmarks/terminalbench_2/default.yaml \
+  "$@" \
+  2>&1 | tee "$LOG_FILE"
+
+echo ""
+echo "Log saved to: $LOG_FILE"