Create an assembly guide

[jamro]

Create a clear, step-by-step assembly guide for the Tiny Engineer robot, covering mechanical assembly, electronics installation, wiring, and final setup.

[jamro]

Electronics assembly

• Waveshare ESP32-C3-Zero — mount it under the lamp. Orient the board so that its onboard LED sits directly below the lamp's glass diffuser.
• Adafruit PCA9685 16-channel PWM servo driver — screw it to the mounting rail under the desk, behind the front panel.
• MAX98357A I2S class-D mono amplifier — screw it to the same mounting rail under the desk, behind the front panel.
• 8 Ω / 1 W mono speaker — there is no dedicated mounting slot. Attach it to one of the interior side walls of the desk, for example using double-sided tape or adhesive.