feat(cli): Add dot test reporter (#19804)

This commit adds a "dot" reporter to "deno test" subcommand,
that can be activated using "--dot" flag.

It provides a concise output using:
- "." for passing test
- "," for ignored test
- "!" for failing test

User output is silenced and not printed to the console.

In non-TTY environments each result is printed on a separate line.

3 files changed, 77 insertions, 0 deletions

diff --git a/cli/tests/testdata/test/steps/failing_steps.dot.out b/cli/tests/testdata/test/steps/failing_steps.dot.out
new file mode 100644
index 000000000..3895a967e
--- /dev/null
+++ b/cli/tests/testdata/test/steps/failing_steps.dot.out
@@ -0,0 +1,54 @@
+[WILDCARD]
+!
+.
+!
+!
+!
+!
+!
+!
+!
+
+ ERRORS 
+
+nested failure ... step 1 ... inner 1 => ./test/steps/failing_steps.ts:[WILDCARD]
+error: Error: Failed.
+      throw new Error("Failed.");
+            ^
+    at [WILDCARD]/failing_steps.ts:[WILDCARD]
+
+multiple test step failures ... step 1 => ./test/steps/failing_steps.ts:[WILDCARD]
+error: Error: Fail.
+    throw new Error("Fail.");
+          ^
+    at [WILDCARD]/failing_steps.ts:[WILDCARD]
+
+multiple test step failures ... step 2 => ./test/steps/failing_steps.ts:[WILDCARD]
+error: Error: Fail.
+  await t.step("step 2", () => Promise.reject(new Error("Fail.")));
+                                              ^
+    at [WILDCARD]/failing_steps.ts:[WILDCARD]
+
+failing step in failing test ... step 1 => ./test/steps/failing_steps.ts:[WILDCARD]
+error: Error: Fail.
+    throw new Error("Fail.");
+          ^
+    at [WILDCARD]/failing_steps.ts:[WILDCARD]
+
+failing step in failing test => ./test/steps/failing_steps.ts:[WILDCARD]
+error: Error: Fail test.
+  throw new Error("Fail test.");
+        ^
+    at [WILDCARD]/failing_steps.ts:[WILDCARD]
+
+ FAILURES 
+
+nested failure ... step 1 ... inner 1 => ./test/steps/failing_steps.ts:[WILDCARD]
+multiple test step failures ... step 1 => ./test/steps/failing_steps.ts:[WILDCARD]
+multiple test step failures ... step 2 => ./test/steps/failing_steps.ts:[WILDCARD]
+failing step in failing test ... step 1 => ./test/steps/failing_steps.ts:[WILDCARD]
+failing step in failing test => ./test/steps/failing_steps.ts:[WILDCARD]
+
+FAILED | 0 passed (1 step) | 3 failed (5 steps) ([WILDCARD])
+
+error: Test failed
diff --git a/cli/tests/testdata/test/steps/ignored_steps.dot.out b/cli/tests/testdata/test/steps/ignored_steps.dot.out
new file mode 100644
index 000000000..e3d3865d4
--- /dev/null
+++ b/cli/tests/testdata/test/steps/ignored_steps.dot.out
@@ -0,0 +1,6 @@
+[WILDCARD]
+,
+.
+.
+
+ok | 1 passed (1 step) | 0 failed | 0 ignored (1 step) [WILDCARD]
diff --git a/cli/tests/testdata/test/steps/passing_steps.dot.out b/cli/tests/testdata/test/steps/passing_steps.dot.out
new file mode 100644
index 000000000..243cacd69
--- /dev/null
+++ b/cli/tests/testdata/test/steps/passing_steps.dot.out
@@ -0,0 +1,17 @@
+[WILDCARD]
+.
+.
+.
+.
+.
+.
+.
+.
+.
+.
+.
+.
+.
+
+ok | 6 passed (21 steps) | 0 failed ([WILDCARD])
+