Add custom nodes, Civitai loras (LFS), and vast.ai setup script

Includes 30 custom nodes committed directly, 7 Civitai-exclusive
loras stored via Git LFS, and a setup script that installs all
dependencies and downloads HuggingFace-hosted models on vast.ai.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom_nodes/ComfyUI-Impact-Pack/tests/RUN_ALL_TESTS.md

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+# Run All Tests
+
+Execute the complete wildcard system test suite.
+
+## Quick Run
+
+```bash
+cd /mnt/teratera/git/ComfyUI/custom_nodes/comfyui-impact-pack/tests
+
+bash test_encoding.sh && \
+bash test_error_handling.sh && \
+bash test_edge_cases.sh && \
+bash test_deep_nesting.sh && \
+bash test_ondemand_loading.sh && \
+bash test_config_quotes.sh && \
+bash test_dynamic_prompts_full.sh
+
+echo ""
+echo "=========================================="
+echo "Test Suite Complete"
+echo "=========================================="
+echo "Total: 86 tests across 7 suites"
+echo ""
+```
+
+## Individual Tests
+
+```bash
+# UTF-8 Encoding (15 tests)
+bash test_encoding.sh
+
+# Error Handling (10 tests)
+bash test_error_handling.sh
+
+# Edge Cases (20 tests)
+bash test_edge_cases.sh
+
+# Deep Nesting (15 tests)
+bash test_deep_nesting.sh
+
+# On-Demand Loading (8 tests)
+bash test_ondemand_loading.sh
+
+# Config Quotes (5 tests)
+bash test_config_quotes.sh
+
+# Dynamic Prompts Full (11 tests)
+bash test_dynamic_prompts_full.sh
+```
+
+## Test Summary
+
+Each test suite:
+- ✅ Starts dedicated ComfyUI server on unique port
+- ✅ Configures test wildcard path
+- ✅ Runs comprehensive test cases
+- ✅ Validates results
+- ✅ Cleans up automatically
+
+## Expected Results
+
+All 89 tests should pass (100% pass rate).
+
+## Logs
+
+Test logs are saved in `/tmp/`:
+- `/tmp/encoding_test.log`
+- `/tmp/error_handling_test.log`
+- `/tmp/edge_cases_test.log`
+- `/tmp/deep_nesting_test.log`
+- `/tmp/ondemand_test.log`
+- `/tmp/config_quotes_test.log`
+- `/tmp/dynamic_prompt_full_validation.log`