Replaced namespace poktroll with pocket

[Alann27]

Summary

• Replaced namespace poktroll with pocket
• Updated proto files

Issue

With the rename of poktroll for pocket in the codebase of poktroll we needed to do the same in pocketdex.

Type of change

Select one or more:

• New feature, functionality or library
• Bug fix
• Code health or cleanup
• Documentation
• Other (specify)

Sanity Checklist

• I have tested my changes using the available tooling
• I have commented my code
• I have performed a self-review of my own code; both comments & source code
• I create and reference any new tickets, if applicable
• I have left TODOs throughout the codebase, if applicable