Merge pull request #2859 from certik/pypi

Add the `lpython` pypi package sources

Author: certik

src/runtime/pypi/LICENSE

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+MIT License
+
+Copyright (c) 2025 The LCompilers Team
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

src/runtime/pypi/README.md

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+# lpython
+
+https://lpython.org/
+
+This is a python package to add typing information to python code. Use LPython
+to compile it.
+
+## Example
+
+```python
+from lpython import i32, f64
+
+def add(a: i32, b: i32) -> i32:
+    return a + b
+
+def area_of_circle(radius: f64) -> f64:
+    pi: f64 = 3.14
+    return pi * (radius * radius)
+
+def main0():
+    print("The sum of 5 and 3 is", end=" ")
+    print(add(5, 3))
+    print("Area of circle with radius 5.0 is", end=" ")
+    print(area_of_circle(5.0))
+
+main0()
+```
+
+```bash
+$ python main.py
+The sum of 5 and 3 is 8
+Area of circle with radius 5.0 is 78.5
+```

src/runtime/pypi/lpython/__init__.py

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+from .lpython import i8, i16, i32, i64, u8, u16, u32, u64, f32, f64, c32, c64, CPtr, Allocatable, overload, ccall, TypeVar, pointer, c_p_pointer, Pointer, p_c_pointer, vectorize, inline, Union, static, packed, Const, sizeof, ccallable, dataclass, In, Out, InOut, ccallback, Callable