add twrp check list and build instructions into readme

template picked from twrp device tree for Samsung Galaxy S25
https://github.com/TeamWin/android_device_samsung_pa1q
android-12.1

README.md

@@ -1 +1,62 @@
 # TWRP configuration for Sony Tama (sdm845) platform devices
+
+## Checks
+
+Blocking checks
+- [x] Correct screen/recovery size
+- [x] Working Touch, screen
+- [x] Backup to internal/microSD
+- [x] Restore from internal/microSD
+- [x] reboot to system
+- [x] ADB
+
+Medium checks
+- [x] update.zip sideload
+- [x] UI colors (red/blue inversions)
+- [x] Screen goes off and on
+- [x] F2FS/EXT4 Support, exFAT/NTFS where supported
+- [x] all important partitions listed in mount/backup lists
+- [x] backup/restore to/from external (USB-OTG) storage
+- [x] decrypt /data
+- [x] Correct date
+- [x] USB-OTG (flash drive)
+
+Minor checks
+- [x] MTP export
+- [x] reboot to bootloader
+- [x] reboot to recovery
+- [x] poweroff
+- [x] battery level
+- [x] temperature
+- [ ] encrypted backups
+- [x] input devices via USB (USB-OTG) - keyboard and mouse
+- [x] USB mass storage export
+- [x] set brightness
+- [x] vibrate
+- [x] screenshot
+- [x] partition SD card
+
+
+## Clone manifest twrp-12.1
+
+```bash
+repo init -u https://github.com/minimal-manifest-twrp/platform_manifest_twrp_aosp.git -b twrp-12.1
+```
+
+## Sync manifest twrp-12.1
+
+```bash
+repo sync -j$(nproc --all)
+```
+
+## Clone the device tree
+
+```bash
+git clone https://github.com/j4nn/android_device_sony_tama.git -b android-12.1 device/sony/tama
+```
+
+## Build
+
+```bash
+export ALLOW_MISSING_DEPENDENCIES=true; . build/envsetup.sh; lunch twrp_akari-userdebug; mka bootimage
+```