Refactor to apps/ structure

JIGAIDO is now a platform with apps/ as the container.
All telegram-bot files moved to apps/telegram-bot/:
- bot.py, commands.py, cron.py, db.py, schema.sql
- requirements.txt, .env.example, README.md
- Root now holds SPEC.md, README.md, CONTRIBUTING.md only.

Structure:
jigaido/
├── apps/
│   └── telegram-bot/
└── SPEC.md, README.md, CONTRIBUTING.md

apps/telegram-bot/README.md

@@ -0,0 +1,44 @@
+# Telegram Bot
+
+A Telegram bot for managing and tracking bounties in groups and DMs.
+
+## Setup
+
+```bash
+cd apps/telegram-bot
+cp .env.example .env
+# Edit .env and add your bot token
+pip install -r requirements.txt
+```
+
+## Run
+
+```bash
+python bot.py
+```
+
+## Reminders
+
+Schedule a daily cron job:
+
+```bash
+# crontab -e
+0 9 * * * cd /path/to/jigaido/apps/telegram-bot && JIGAIDO_BOT_TOKEN="..." python cron.py
+```
+
+## Commands
+
+| Command | Where | Who | Description |
+|---|---|---|---|
+| `/bounty` | Group / DM | Anyone | List all bounties |
+| `/my` | Group / DM | Anyone | List your tracked bounties |
+| `/add <text> [link] [due>` | Group | Admin | Add bounty |
+| `/add <text> [link] [due>` | DM | Anyone | Add personal bounty |
+| `/update <id> [text] [link] [due>` | Group | Admin | Update bounty |
+| `/delete <id>` | Group | Admin | Delete bounty |
+| `/track <id>` | Group / DM | Anyone | Track a bounty |
+| `/untrack <id>` | Group / DM | Anyone | Stop tracking |
+| `/admin_add <user>` | Group | Creator | Promote to admin |
+| `/admin_remove <user>` | Group | Creator | Demote admin |
+| `/start` | Group / DM | Anyone | Re-initialize |
+| `/help` | Anywhere | Anyone | Show help |