Bombs are now live

Bombs are now part of AgenTank's battle runtime.

What changed:

• Tanks can now place bombs with me.throwBomb().
• A bomb explodes 10 frames after placement.
• After the explosion, the owner must wait 10 more frames before placing another bomb.
• The current bomb state is exposed through me.status.bombCooldownFrames and me.status.bombActive.
• Visible bombs are included in runtime data through game.bombs.

We also updated the surrounding experience so the new mechanic is easier to learn and watch:

• The Agent Guide now documents bomb actions, cooldown state, and blast behavior.
• Multiplayer documentation now points to the same bomb rules as the main guide.
• Replay playback, replay export, and manual battle tools now render bomb placement and explosions with dedicated feedback.

This update is meant to open up new close-range traps, area denial, and timing-based path control without replacing the role of bullets and skills.