all: fix project name

[tsubakiky]

This pull request renames the Python package connectpy to gconnect and updates all relevant imports, dependencies, and references across the project to reflect this change. The changes include modifications to documentation, source code, and configuration files. Below is a summary of the most important changes grouped by theme.

Package Renaming

• The package name has been updated from connectpy to gconnect in the pyproject.toml file and other configuration files. This includes renaming the package directory from src/connect to src/gconnect and updating the packages and path fields accordingly. [1] [2]

Documentation Updates

• Updated the README.md file to use gconnect in installation instructions, import examples, and contribution guidelines. [1] [2] [3] [4]

Source Code Changes

• Replaced all instances of connect imports with gconnect in Python source files, including client.py, server.py, and various generated files. [1] [2] [3] [4] [5]
• Updated Go code to reflect the renaming in headers and comments, such as in examples-go/client/main.go.

Dependency Updates

• Replaced connectpy with gconnect in dependency lists in pyproject.toml and other configuration files. [1] [2]

Example Code Adjustments

• Updated example client and server code to use gconnect imports and dependencies. This includes Python examples (examples/client.py, examples/server.py) and Go examples. [1] [2] [3]

These changes ensure a consistent transition from connectpy to gconnect across the project.