elf_loader refactored and added more symbols (#347)

Documentation/ideas.md

@@ -15,6 +15,16 @@
   Write the user choice to a file on the card.
   File contains 3 statuses: ignore, data, .. initdata?
   The latter is used for auto-selecting it as data partition.
+- Support direct installation of an `.app` file with `tactility.py install helloworld.app <ip>`
+- Support `tactility.py target <ip>` to remember the device IP address.
+- External app error code 22 should warn that the user might've forgotten a `main()` entry point
+- Bug: `Buildscript/release-sdk-current.sh` should delete the currently released SDK. It should probably also output it with versioning and target platform naming so it can be referred to as if it is a real release.
+- Tactility docs: external app dev guide should explain [debugging](https://docs.zephyrproject.org/latest/services/llext/debug.html)
+- elf_loader changes/suggestions:
+    - Make entry-point optional (so we can build libraries, or have the `manifest` as a global symbol)
+    - Implement support for alternative symbol lists. e.g. a function pointer that resolves a single symbol.
+- Implement the entire list of [soft-float library functions](https://gcc.gnu.org/onlinedocs/gccint/Soft-float-library-routines.html) to `tt_init.cpp`
+- `tactility.py` should stop running applications when it is: uninstalling, installing, or running an application that is already running.
 
 ## Medium Priority
 
@@ -29,6 +39,7 @@
 - Bug: Turn on WiFi (when testing it wasn't connected/connecting - just active). Open chat. Observe crash.
 - Bug: Crash handling app cannot be exited with an EncoderDevice. (current work-around is to manually reset the device)
 - I2C app should show error when I2C port is disabled when the scan button was manually pressed
+- TactilitySDK: Support automatic scanning of header files so that we can generate the `tt_init.cpp` symbols list.
 
 ## Lower Priority