feat: promote botfights from web-only to container app

Convert botfights from external link to real container app on port 9100.
Add manifest, update marketplace/discover/kiosk/session configs, switch
registry URLs to git.tx1138.com.

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

neode-ui/src/views/appSession/appSessionConfig.ts

@@ -42,6 +42,7 @@ export const APP_PORTS: Record<string, number> = {
   'fips':          8202,
   'routstr':       8200,
   'indeedhub':     7777,
+  'botfights':     9100,
   'dwn':           3100,
   'endurain':      8080,
 }
@@ -93,7 +94,6 @@ export const HTTPS_PROXY_PATHS: Record<string, string> = {
 
 /** External HTTPS apps -- always loaded directly */
 export const EXTERNAL_URLS: Record<string, string> = {
-  'botfights': 'https://botfights.net',
   'nwnn': 'https://nwnn.l484.com',
   '484-kitchen': 'https://484.kitchen',
   'call-the-operator': 'https://cta.tx1138.com',