test: Baseline for generic ignore

crates/typos-cli/tests/cmd/extend-ignore-re.in/_typos.toml

@@ -0,0 +1,5 @@
+[files]
+extend-exclude = ["_typos.toml"]
+
+[default.extend-identifiers]
+hello = "goodbye"

crates/typos-cli/tests/cmd/extend-ignore-re.in/file.ignore

@@ -0,0 +1 @@
+hello `hello`

crates/typos-cli/tests/cmd/extend-ignore-re.toml

@@ -0,0 +1,18 @@
+bin.name = "typos"
+stdin = ""
+stdout = """
+error: `hello` should be `goodbye`
+  --> ./file.ignore:1:1
+  |
+1 | hello `hello`
+  | ^^^^^
+  |
+error: `hello` should be `goodbye`
+  --> ./file.ignore:1:8
+  |
+1 | hello `hello`
+  |        ^^^^^
+  |
+"""
+stderr = ""
+status.code = 2