Add Forced Alignment Client and Models (#120)

[sourman]

• Introduced ForcedAlignmentClient for interacting with the Rev AI forced alignment API.
• Added data models: ForcedAlignmentJob, ForcedAlignmentResult, ElementAlignment, and Monologue to handle alignment jobs.
• Implemented methods for processing jobs in forced_alignment_client.
• Created a module for forced alignment models to organize classes.