Add entry-points printer to identify all externally accessible state-changing functions

[nisedo]

Description

This PR adds a new printer that identifies all externally accessible state-changing functions (entry points) of Solidity smart contracts.
The printer helps in security analysis by providing a clear overview of possible external interactions and assists auditors in identifying all workflows that need to be reviewed during security assessments.

Key features:

• Filters out view/pure functions, constructors, and special functions (receive/fallback)
• Excludes contracts from utility/testing directories (lib/, node_modules/, mock/)
• Shows inheritance information for each contract
• Displays function modifiers and inherited function origins
• Color-coded output for better readability

The printer can be used with:
slither <contract> --print entry-points

Example output:

The implementation can be found in:
slither/printers/summary/entry_points.py

Note

Currently, this printer only supports Solidity files. Support for Vyper contracts will be implemented in a future update.

[CLAassistant]

All committers have signed the CLA.