improve chat sample cli.

[vwxyzh]

This pull request refactors and enhances argument parsing in the ChatSample.Cli application. The most significant changes include adding regular expressions for argument validation, introducing a reusable ParseArguments method, and updating existing methods to use this new approach. These changes improve code maintainability, readability, and robustness when handling user inputs.

Enhancements to Argument Parsing:

• Expanded TypeInfo Record: Added a Regex property to the TypeInfo record to associate each type with a regular expression for validation. Updated the TypeMap dictionary to include these regular expressions for supported types (int, string, bool, double, and binary). [1] [2]

• Added Regular Expressions: Introduced several GeneratedRegex methods for validating input types, including IntegerRegex, StringRegex, BooleanRegex, DoubleRegex, BytesRegex, and ParameterEndRegex. These regex patterns ensure inputs conform to expected formats.

Code Refactoring for Reusability:

• New ParseArguments Method: Created a reusable ParseArguments method to handle argument parsing and validation using the associated regex patterns in TypeInfo. This method streamlines the validation process and centralizes error handling.

• Refactored Existing Methods: Updated the Send, ClientSend, and ClientStream methods to use the new ParseArguments method, replacing inline argument parsing logic. This reduces code duplication and enhances readability. [1] [2] [3]

Bug Fix:

• Fixed Escape Character Handling: Updated the Escape method to correctly handle escaped backslashes (\) in string inputs, ensuring proper parsing of escaped characters.

[vicancy]

add some test coverage?