Remove requirements.txt and use pyproject.toml dependencies

[ducky64]

No description provided.

[Copilot]

Pull request overview

Migrates Python dependency management from requirements.txt to pyproject.toml, and updates CI/docs to install the package (and dev extras) via pip from the project metadata.

Changes:

• Remove requirements.txt and rely on [project.dependencies] / [project.optional-dependencies] in pyproject.toml.
• Update GitHub Actions workflows to pip install -e . / pip install -e .[dev] instead of pip install -r requirements.txt.
• Add a brief “building from source” install note to the README.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
requirements.txt	Removed legacy dependency list in favor of pyproject.toml.
pyproject.toml	Adds pydantic to core deps; moves typing stubs into dev extra.
README.md	Documents source install command.
.github/workflows/pr-scala.yml	CI now installs the Python package from the repo root.
.github/workflows/pr-python.yml	CI now installs package/dev extra instead of requirements.txt.

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[Copilot]

typing_extensions is already a core dependency (typing_extensions >= 4.4.0), so listing it again in the dev extra is redundant. Removing the duplicate entry will reduce confusion and keep dependency definitions single-sourced.

Suggested change

	"typing_extensions",
	"types-Deprecated==1.2.9.20240311",
	"types-protobuf"
	]
	"types-Deprecated==1.2.9.20240311",
	"types-protobuf"
	]

[Copilot]

The workflow installs .[dev] (which already includes black) and then installs black again. This is redundant and can introduce nondeterminism if the extra and the subsequent install resolve to different versions; prefer installing black in one place (either via the dev extra, or remove it from the extra and install it explicitly here).

Suggested change

pip install black

[Copilot]

There’s an extra space after the colon and trailing whitespace at the end of this line. Cleaning this up avoids markdown lint noise and keeps formatting consistent.

Suggested change

	Building from source: `pip install .` at the repository root.
	Building from source: `pip install .` at the repository root.

[Copilot]

Since requirements.txt is being removed, the effective constraint for Deprecated becomes unpinned ("Deprecated"). Previously it was pinned to 1.2.14 in requirements.txt; consider pinning it here as well to avoid accidental upgrades breaking runtime behavior/CI reproducibility.

Suggested change

	"Deprecated",
	"Deprecated==1.2.14",