add gswm and gswd command

[alex-glez-felix]

This pull request introduces new git aliases and functions to streamline branch switching in the repository. The main changes include adding new aliases for switching to the main and develop branches and implementing corresponding functions.

New git aliases and functions:

• aliases.md: Added new aliases gswm for switching to the main branch and gswd for switching to the develop branch.
• src/aliases.ps1: Added functions gswm and gswd to switch to the main and develop branches, respectively.
• src/git-aliases.psm1: Updated the list of functions to export, including the new gswm and gswd functions.

Utility functions:

• src/utils.ps1: Added a new function Get-Git-DevelopBranch to determine the develop branch name from a set of common names.