Add LICENSE file

This pull request adds a LICENSE file to the repository based on the license declared in your repository metadata.

### Background

Your repository declares the `BSD-3-Clause` license in its HuggingFace metadata (`license:bsd-3-clause`), but does not currently include a LICENSE file in the repository. This creates legal ambiguity and makes it harder for users to understand the exact terms under which they can use your work.

### What This PR Does

This PR adds a standard `LICENSE` file containing the full text of the **BSD 3-Clause "New" or "Revised" License**, with:
- Copyright holder: `zcxu-eric` (repository owner)
- Copyright year: `2023` (based on first commit)

### Why This Matters

Having an explicit LICENSE file in your repository:
- ✅ Provides clear legal terms for users
- ✅ Matches your declared license metadata
- ✅ Makes it easier for others to comply with your license
- ✅ Improves repository completeness and professionalism

### Please Review

**Important:** Please verify that:
1. The copyright holder is correct (I've used the repository owner: `zcxu-eric`)
2. The copyright year is appropriate (I've used the first commit year: `2023`)
3. The license matches your intent (based on your metadata: `BSD-3-Clause`)

If any of these need to be updated, please let me know and I'll gladly adjust the LICENSE file!

### References

- License metadata: `license:bsd-3-clause`
- SPDX specification: https://opensource.org/licenses/BSD-3-Clause

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🤖 Generated with automated license compliance tooling

LICENSE

@@ -0,0 +1,11 @@
+Copyright (c) 2023 zcxu-eric. 
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.