Add mode support (#333)

* Add mode support

* update "as any" with proper "as unknwon as ModeName" casting

* Add documentation to README and registry.ts

* Add  tests for differen event types, integration flows, and error conditions

* Clean up some tests

* Minor test fix

* Minor formatting test + switch from interface to type

* correct the order of mkdir call

* always configureGitAuth as there's already a fallback to handle null users by using the bot ID

* simplify registry setup

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Co-authored-by: km-anthropic <km-anthropic@users.noreply.github.com>

test/mockContext.ts

@@ -8,6 +8,7 @@ import type {
 } from "@octokit/webhooks-types";
 
 const defaultInputs = {
+  mode: "tag" as const,
   triggerPhrase: "/claude",
   assigneeTrigger: "",
   labelTrigger: "",