refactor(core): break down core into independent crates

This commit restructures the core module by splitting it into smaller, more focused crates to improve modularity and maintainability. Key changes include:

- Split job-related functionality into dedicated crates:
  - job-system: Core job execution infrastructure
  - job-errors: Centralized error handling
  - file-actions: File operations (copy, delete)
  - location-scan: File identification and indexing

- Extracted core components into separate crates:
  - context
  - custom-uri
  - device (formerly node)
  - library
  - location
  - preferences
  - search
  - tag
  - volume

- Renamed crates for clarity:
  - file-path-helper -> file-helper
  - sync -> library-sync
  - heavy-lifting -> location-scan

This restructuring improves code organization, reduces coupling, and makes the codebase more maintainable.

.cspell/project_words.txt

@@ -2,6 +2,7 @@ akar
 allred
 alluxio
 APFS
+appender
 augusto
 automount
 benja