Package filter conf parser (#1012)

Adds a parser and evaluator for the fapolicyd filter config

The public api here is not integrated into the system in this PR. A
later commit will integrate it as the backend of the editor.

The evaluation function implemented here can be used to enhance the
analysis view by tying a trust decision back to a line from rpm filter,
similar to how rules are referenced. A difference between rules and
trust here is that the trust relation may not exist, where the rule
relation always exists.

The impl uses a trie to map characterwise for searching. The impl
supports the same wildcard characters as the fapolicyd impl. There is
decent test coverage, but likely more corner cases. Configurations from
the wild, mapped into tests, would be useful. The examples from the
fapolicyd man pages are mapped to tests.

#758

crates/trust/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 
 [dev-dependencies]
 tempfile = "3.3"
+assert_matches = "1.5"
 
 [dependencies]
 lmdb = "0.8"