Add new problem matcher that is aware of color codes

The action runner currently fails to strip color codes from the output.
This means that many matchers currectly do not work.

https://github.com/actions/runner/issues/2341
https://github.com/actions/runner/pull/2430

The new matcher is copied from kaj/rsass which is MIT licensed.

3e5d6c0600/.github/workflows/rust-problem-matcher.json

rust.json

@@ -16,16 +16,16 @@
             "owner": "clippy",
             "pattern": [
                 {
-                    "regexp": "^(warning|warn|error)(\\[(.*)\\])?: (.*)$",
+                    "regexp": "^(?:\\x1b\\[[\\d;]+m)*(warning|warn|error)(?:\\x1b\\[[\\d;]+m)*(\\[(.*)\\])?(?:\\x1b\\[[\\d;]+m)*:(?:\\x1b\\[[\\d;]+m)* ([^\\x1b]*)(?:\\x1b\\[[\\d;]+m)*$",
                     "severity": 1,
                     "message": 4,
                     "code": 3
                 },
                 {
-                    "regexp": "^([\\s\\->=]*(.*):(\\d*):(\\d*)|.*)$",
-                    "file": 2,
-                    "line": 3,
-                    "column": 4
+                    "regexp": "^(?:\\x1b\\[[\\d;]+m)*\\s*(?:\\x1b\\[[\\d;]+m)*\\s*--> (?:\\x1b\\[[\\d;]+m)*(.*):(\\d*):(\\d*)(?:\\x1b\\[[\\d;]+m)*$",
+                    "file": 1,
+                    "line": 2,
+                    "column": 3
                 }
             ]
         }