docs: add datasheet references and remove obsolete devkit docs

doc/datasheets/README.md

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+# Datasheet References
+
+Use the official links below to access the latest
+manufacturer documentation.
+
+Links were checked on 2026-07-11.
+
+| Part | Manufacturer | Description | Official reference |
+| --- | --- | --- | --- |
+| ADAU1860 | Analog Devices | Low-power codec with audio DSPs | [Product page](https://www.analog.com/en/products/adau1860.html) |
+| AP22916 | Diodes Incorporated | 1.3 V to 5.5 V, 2 A ultra-low leakage load switch | [Datasheet](https://www.diodes.com/datasheet/download/AP22916.pdf) |
+| BMA580 | Bosch Sensortec | Triaxial low-g accelerometer | [Product page](https://www.bosch-sensortec.com/en/products/motion-sensors/accelerometers/bma580/) |
+| BMP388 | Bosch Sensortec | Digital barometric pressure sensor | [Datasheet](https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp388-ds001.pdf) |
+| BMX160 | Bosch Sensortec | 9-axis motion sensor | [Bosch Sensortec support](https://community.bosch-sensortec.com/mems-sensors-forum-jrmujtaw/post/bmx160-n9LMjxXcz8gNeCu) |
+| BQ25120A | Texas Instruments | Battery charge management solution for wearables and IoT | [Product page](https://www.ti.com/product/BQ25120A) |
+| BQ27220 | Texas Instruments | Single-cell CEDV fuel gauge | [Product page](https://www.ti.com/product/BQ27220) |
+| BQ27220 technical reference | Texas Instruments | Technical reference manual for BQ27220 | [Technical reference manual](https://www.ti.com/lit/ug/sluubd4a/sluubd4a.pdf) |
+| CSD13380F3 | Texas Instruments | 12 V N-channel FemtoFET MOSFET | [Product page](https://www.ti.com/product/CSD13380F3) |
+| CSD23382F4 | Texas Instruments | -12 V P-channel FemtoFET MOSFET | [Product page](https://www.ti.com/product/CSD23382F4) |
+| KTD2026 | Kinetic Technologies | 3-channel RGB/white LED driver with I2C control | [Product page](https://www.kinet-ic.com/ktd2026/) |
+| MAXM86161 | Analog Devices | Integrated optical module for heart-rate and SpO2 measurement | [Product page](https://www.analog.com/en/products/maxm86161.html) |
+| MDBT53 | Raytac | nRF5340-based Bluetooth Low Energy module | [Product page](https://www.raytac.com/product/ins.php?index_id=123) |
+| MLX90632 | Melexis | FIR sensor thermometer | [Datasheet page](https://www.melexis.com/en/documents/documentation/datasheets/datasheet-mlx90632) |
+| MX25R6435F | Macronix | 64 Mbit serial NOR flash | [Datasheet](https://www.macronix.com/Lists/Datasheet/Attachments/8868/MX25R6435F%2C%20Wide%20Range%2C%2064Mb%2C%20v1.6.pdf) |
+| PRTR5V0U2F | Nexperia | Ultra-low capacitance double rail-to-rail ESD protection | [Product page](https://www.nexperia.com/product/PRTR5V0U2F) |
+| SN74AXC4T774 | Texas Instruments | 4-bit dual-supply bus transceiver and voltage translator | [Product page](https://www.ti.com/product/SN74AXC4T774) |
+| SPH0641LU4H-1 | Syntiant / Knowles | Digital PDM SiSonic MEMS microphone | [MEMS microphone page](https://www.syntiant.com/products/sensors-and-microphones/mems/) |
+| nRF5340 | Nordic Semiconductor | Dual-core Bluetooth SoC product specification | [Product specification](https://docs.nordicsemi.com/bundle/ps_nrf5340/page/keyfeatures_html5.html) |