Polishing of startup scripts.

[alexheifetz]

This pull request refactors the script files to centralize environment checks and Maven execution logic into reusable agent.bat and agent.sh scripts. It also removes redundant PowerShell scripts, simplifying the codebase and improving maintainability.

Centralization of Environment Checks and Maven Execution:

• Added scripts/support/agent.bat and scripts/support/agent.sh to handle environment checks and Maven execution. These scripts ensure the AGENT_APPLICATION variable is set, verify the presence of the pom.xml file, and execute the Spring Boot application. [1] [2]

Refactoring of Existing Scripts:

• Updated mcp_server.cmd, mcp_server.sh, shell.cmd, shell.sh, and shell_docker.cmd to delegate environment checks and Maven execution to the new agent.bat and agent.sh scripts. This reduces code duplication across scripts. [1] [2] [3] [4] [5]
• Added new shell.sh and shell.cmd scripts for the "shell" profile, leveraging the centralized logic. [1] [2]

Removal of Redundant Scripts:

• Removed the PowerShell script scripts/shell_docker.ps1 and the environment check script scripts/support/check_env.ps1, as their functionality is now integrated into agent.bat and agent.sh. [1] [2]