Fix Polymaker filament name: "Stain" → "Satin" (filenames + references)

[pcdrivers]

Description

This PR fixes a typo in the Polymaker filament product name:

• Incorrect: Stain
• Correct: Satin

✅ Changes include:

• Renamed affected filenames using Satin instead of Stain
• Updated internal code references (labels, product names, identifiers where required)
• Ensured naming consistency across UI content

No functional behavior has been changed — only corrected naming inconsistencies.

Screenshots/Recordings/Graphs

Not applicable — no UI/visual changes introduced.

Tests

• Verified that all renamed files are referenced correctly after update
• Searched the codebase to avoid remaining occurrences of Stain
• Build/lint checks passing (if applicable)

[igiannakas]

This breaks all profiles that reference this. For example the Bambu profiles.

Could you please correct this?