feat(prd-5): add dedicated claude-bot user for Forgejo

- Add bot_email action input for custom git commit email on Forgejo
- Update claude.yml to use CLAUDE_BOT_TOKEN with bot_id/bot_name/bot_email
- Update git-config.ts to use provided email over noreply format
- Add "Dedicated Bot User" setup guide to docs/forgejo.md
- Update CLAUDE.md with bot identity documentation

Infrastructure (done outside code):
- claude-bot user created (ID 48, non-admin, with avatar)
- Claude team with write access in all 12 orgs
- CLAUDE_BOT_TOKEN org-level secret in all 12 orgs

Progress: ~85% complete - pending E2E validation after merge

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/modes/agent/index.ts

@@ -41,6 +41,7 @@ export async function prepareAgentMode({
     const user = {
       login: context.inputs.botName,
       id: parseInt(context.inputs.botId),
+      email: context.inputs.botEmail || undefined,
     };
     try {
       await configureGitAuth(githubToken, context, user);
@@ -53,6 +54,7 @@ export async function prepareAgentMode({
     const user = {
       login: context.inputs.botName,
       id: parseInt(context.inputs.botId),
+      email: context.inputs.botEmail || undefined,
     };
 
     try {

src/modes/tag/index.ts

@@ -86,6 +86,7 @@ export async function prepareTagMode({
     const user = {
       login: context.inputs.botName,
       id: parseInt(context.inputs.botId),
+      email: context.inputs.botEmail || undefined,
     };
     try {
       await configureGitAuth(githubToken, context, user);
@@ -98,6 +99,7 @@ export async function prepareTagMode({
     const user = {
       login: context.inputs.botName,
       id: parseInt(context.inputs.botId),
+      email: context.inputs.botEmail || undefined,
     };
 
     try {