What does this PR do?

This PR implements a comprehensive pCloud integration that enables users to interact with their pCloud storage through various actions and triggers. It provides a seamless way to manage files and folders in pCloud, including creating folders, finding files/folders, copying files, and downloading content.

Explain How the Feature Works

The integration provides the following capabilities:

1. Triggers

   • New File: Automatically detects when new files are uploaded to a specified folder
   • New Folder: Monitors for new folder creation in a specific location

2. Actions

   • Create Folder: Create new folders in pCloud storage
   • Find File: Search for files by name or path
   • Find Folder: Search for folders by name or path
   • Copy File: Copy files to different locations
   • Download File: Download files from pCloud storage

The integration uses OAuth2 authentication for secure access to pCloud accounts and implements proper error handling and type safety throughout.

Relevant User Scenarios

1. Automated File Organization

   • When new files are uploaded to a specific folder, automatically organize them into appropriate subfolders
   • Example: Automatically move downloaded documents to categorized folders based on file type

2. Backup Automation

   • Copy important files to backup locations
   • Example: Automatically backup project files to a designated backup folder

3. File Monitoring

   • Get notified when new files or folders are created
   • Example: Monitor a shared folder for new project deliverables

4. Content Management

   • Search and organize files across pCloud storage
   • Example: Find all PDF documents in a specific project folder

5. File Distribution

   • Download and distribute files automatically
   • Example: Download reports and send them to team members

Fixes #7670 /claim #7670