refactor: complete v1.0 simplification by removing all legacy inputs

- Remove all backward compatibility for v1.0 simplification
- Remove 10 legacy inputs from base-action/action.yml
- Remove 9 legacy inputs from main action.yml
- Simplify ClaudeOptions type to just timeoutMinutes and claudeArgs
- Remove all legacy option handling from prepareRunConfig
- Update tests to remove references to deleted fields
- Remove obsolete test file github/context.test.ts
- Clean up types to remove customInstructions, allowedTools, disallowedTools

Users now use claudeArgs exclusively for CLI control.

test/trigger-validation.test.ts

@@ -32,12 +32,8 @@ describe("checkContainsTrigger", () => {
           triggerPhrase: "/claude",
           assigneeTrigger: "",
           labelTrigger: "",
-          allowedTools: [],
-          disallowedTools: [],
-          customInstructions: "",
           branchPrefix: "claude/",
           useStickyComment: false,
-          additionalPermissions: new Map(),
           useCommitSigning: false,
         },
       });
@@ -63,12 +59,8 @@ describe("checkContainsTrigger", () => {
           triggerPhrase: "/claude",
           assigneeTrigger: "",
           labelTrigger: "",
-          allowedTools: [],
-          disallowedTools: [],
-          customInstructions: "",
           branchPrefix: "claude/",
           useStickyComment: false,
-          additionalPermissions: new Map(),
           useCommitSigning: false,
         },
       });
@@ -278,12 +270,8 @@ describe("checkContainsTrigger", () => {
           triggerPhrase: "@claude",
           assigneeTrigger: "",
           labelTrigger: "",
-          allowedTools: [],
-          disallowedTools: [],
-          customInstructions: "",
           branchPrefix: "claude/",
           useStickyComment: false,
-          additionalPermissions: new Map(),
           useCommitSigning: false,
         },
       });
@@ -310,12 +298,8 @@ describe("checkContainsTrigger", () => {
           triggerPhrase: "@claude",
           assigneeTrigger: "",
           labelTrigger: "",
-          allowedTools: [],
-          disallowedTools: [],
-          customInstructions: "",
           branchPrefix: "claude/",
           useStickyComment: false,
-          additionalPermissions: new Map(),
           useCommitSigning: false,
         },
       });
@@ -342,12 +326,8 @@ describe("checkContainsTrigger", () => {
           triggerPhrase: "@claude",
           assigneeTrigger: "",
           labelTrigger: "",
-          allowedTools: [],
-          disallowedTools: [],
-          customInstructions: "",
           branchPrefix: "claude/",
           useStickyComment: false,
-          additionalPermissions: new Map(),
           useCommitSigning: false,
         },
       });