Adding sam2 weight fetcher, config file and pypoject.toml typo error fixing

[Hitdahit]

Problem Statement

• DAM repository supports selective SAM2 build during DAM installation.
  • by pip install -e ".[sam2]"
• But we need SAM2 config file and weight file to use SAM2 which is not automatically fetched by their installation.
• Also there is typo error in pyproject.toml related to SAM2.

Solution

• Edited pyproject.toml's typo error and added SAM2 (sam2.1_hiera_large) config file
• Also added SAM2 (sam2.1_hiera_large) weight fetching script named get_sam2_weight.sh
• By these changes, you can install and use DAM with SAM2 without any errors.

Installation Guide should be changed like this.

1. git clone && cd
2. execute get_sam2_weight.sh
3. pip install -e ".[sam2]"

[TonyLianLong]

Thanks for the PR. I fixed the typo in pyproject.toml and added instructions to let the user install SAM 2 first.

[Hitdahit]

Thank you for fast reaction. Byt the way, do you have any plan to open DLC-SDP or train/finetune code in this repository?