Support custom progress categories

[encounter]

Example:

config.progress_categories = [
    ProgressCategory("game", "Game Code"),
    ProgressCategory("sdk", "SDK Code"),
]

config.libs = [
    {
        "lib": "LibraryA",
        "progress_category": "sdk", # For a whole library
        "objects": [
            # Override a specific object
            Object(NonMatching, "file.c", progress_category=["sdk", "game"]),
        ],
    },
]

Progress output:

[1/2] PROGRESS
Progress:
  All: 1.18% code, 0.66% data (10 / 4874 files)
    Code: 41992 / 3558032 bytes
    Data: 30573 / 4636761 bytes
  DOL: 1.33% code, 1.08% data (10 / 4864 files)
    Code: 41992 / 3147956 bytes
    Data: 30573 / 2829573 bytes
  Modules: 0.00% code, 0.00% data (0 / 10 files)
    Code: 0 / 410076 bytes
    Data: 0 / 1807188 bytes
  Game Code: 1.33% code, 1.08% data (10 / 4864 files)
    Code: 41992 / 3147956 bytes
    Data: 30573 / 2829573 bytes
  SDK Code: 0.00% code, 0.00% data (0 / 10 files)
    Code: 0 / 410076 bytes
    Data: 0 / 1807188 bytes

Progress categories will be automatically included in the objdiff report as well.