Podcast feature added

[barrybtw]

Podcast feature in issue #310 has been added, can receive a m4a file and json transcript and give the wished product in the issue.

[what-the-diff]

PR Summary

• Introduction of a new dependency "zod"
  The project now has a new dependency, "zod", in its main configuration file. This delivers improved validation, parsing, and serialization for project data.

• Addition of a new audio file
  A fresh audio file named "2024-06.m4a" has been added into the project's public assets. This provides additional content to be utilized within the podcasts of the project.

• Creation of a dedicated component for podcast pages
  A new file has been introduced, labeled "podcasts/[slug].tsx". This serves as a new dedicated page for podcasts, enhancing the project's react component structure.

• Defining interfaces related to transcripts
  A utilities file has been created named "transcript-types.ts", which is responsible for defining various interfaces related to podcast transcripts. This helps structure the data more effectively for use within the project.

• Enhancements to podcast's display and functionality
  There has been a significant modification in the file "podcasts/[slug].tsx" where enhancements in audio playback and podcast transcripts are clearly visible. This also includes improvements in the way podcasts are displayed, offering a more engaging user experience.

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[vcarl]

Resolves #310 ! Ty for the implementation @barrybtw !