refactor: 将子模块转为普通目录，移除外部 git 依赖

- 移除 JEPA/lejepa-identifiability 子模块 gitlink
- 移除 research/multiply/MultiPLY 子模块 gitlink
- 删除 .gitmodules（不再有外部 URL 依赖）
- 两个目录内容作为普通文件纳入主仓库追踪
- 删除各自内部 .git 目录，消除嵌套 git 仓库

JEPA/lejepa-identifiability/experiments/slurm/launch_2d.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+#SBATCH --job-name=lejepa_2d
+#SBATCH --output=logs/2d_%A_%a.out
+#SBATCH --error=logs/2d_%A_%a.err
+#SBATCH --partition=gpuq
+#SBATCH --qos=slow_nice
+#SBATCH --gres=gpu:v100:1
+#SBATCH --cpus-per-task=4
+#SBATCH --mem=16G
+#SBATCH --time=02:00:00
+#SBATCH --array=0-7   # 8 runs; seeds loop inside
+
+RUNS=(spiral_lejepa spiral_whiten banana_lejepa banana_whiten \
+      sinusoid_lejepa sinusoid_whiten nvp_lejepa nvp_whiten)
+SEEDS=(1337 1338 1339)
+
+RUN=${RUNS[$SLURM_ARRAY_TASK_ID]}
+
+eval "$(conda shell.bash hook)"
+conda activate pytorch
+
+mkdir -p logs
+for SEED in "${SEEDS[@]}"; do
+    echo "${RUN} seed=${SEED}"
+    python run.py --config configs/2d.yaml \
+        --run "${RUN}" --seed "${SEED}"
+done