Add SSD1306 Test app (GPIO)

[martinbogo]

Summary

• Adds SSD1306 Test, a diagnostic tool for external SSD1306-based 128x64 I2C OLED displays connected via the Flipper Zero GPIO header
• Category: GPIO
• App ID: ssd1306_test
• Source: https://github.com/martinbogo/ssd1306_test

App Features

• Clock + Status Board with large 7-segment digits, battery, date, and device name
• 10 test patterns (all white/black, checkerboard, gradient, color zone test, etc.)
• Brightness/contrast control (0-255)
• Display command toggles (invert, flip H/V, force all pixels, power on/off)
• Hardware scrolling (horizontal, diagonal, adjustable speed)
• Display info with live I2C connection status
• Auto-detects I2C address (0x3C and 0x3D)
• Supports both monochrome and yellow-bar (dual-color) SSD1306 variants

Checklist

• App builds with ufbt against latest release SDK
• application.fam contains appid, name, fap_category, fap_version, fap_author, fap_icon
• Source repo contains README.md, CHANGELOG.md, and screenshots
• Screenshot taken with qFlipper
• App is open source (MIT license)
• manifest.yml references a specific commit SHA

[martinbogo]

Hi! Is there anything else I need to do?

[xMasterX]

Replace
#define PLANT_SAVE_PATH EXT_PATH("apps_data/ssd1306_test.sav")
With
#define PLANT_SAVE_PATH EXT_PATH("apps_data/ssd1306_test/ssd1306_test.sav")

[martinbogo]

absolutely. Will do on Tuesday and update PR. Thx!

[martinbogo]

Done -- save path updated to apps_data/ssd1306_test/ssd1306_test.sav and the directory is created on first save. Manifest SHA updated to point to the new commit.

[martinbogo]

The fix is in the source repo -- the manifest commit_sha has been updated to point to the commit that addresses your feedback: martinbogo/ssd1306_test@4a69219

The change moves the save path from apps_data/ssd1306_test.sav to apps_data/ssd1306_test/ssd1306_test.sav and creates the subdirectory on first save.