fix(conda_types): parse features and license_family in MatchSpec

[ritankarsaha]

Description

• Add features: Option and license_family: Option to both MatchSpec and
  NamelessMatchSpec
  • Wire through into_nameless, From for NamelessMatchSpec, and from_nameless
  • Emit both fields in Display for MatchSpec and NamelessMatchSpec (enables roundtrip)
  • Add matching logic in Matches for both structs (exact-match, same as license)
  • Replace the TODO comment in the bracket parser with two new "license_family" / "features" match
    arms
  • Update test_matchspec_to_string insta snapshot to include both new fields

Fixes #2174

How Has This Been Tested?

• test_parsing_license_family — parses python[license_family=MIT] and verifies roundtrip via Display
• test_parsing_features — parses numpy[features=blas] and verifies roundtrip via Display
• test_features_and_license_family_matching — constructs a PackageRecord with both fields and asserts correct match/no-match behaviour for MatchSpec

Test plan

• cargo test -p rattler_conda_types match_spec — 100 tests pass (3 new)
• cargo clippy -p rattler_conda_types — no new warnings
• cargo fmt -p rattler_conda_types -- --check — clean

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added sufficient tests to cover my changes.

[ritankarsaha]

@baszalmstra can you take a look into this ? Fixed all failing CIs properly

[baszalmstra]

Features have been deprecated and can be removed here.

[baszalmstra]

Features are not used anymore so this is not needed.