Improve memory footprint

[AzonInc]

I tried to reduce the memory footprint and improve efficiency.
Would be nice if someone could give it a try and report about the stability.

Changes

• Replaced std::string with a fixed-size character array, using memset, strcpy, and strcmp to save additional bytes.
• Fixed the deviceName log line.

Additions

• Added the build flag CONFIG_BT_NIMBLE_MEM_ALLOC_MODE_EXTERNAL when using the psram component to enable PSRAM usage for the NimBLE host.
• Added an option to disable the alternative connect mode.
• Enabled support for pairing as an app.
• Added a Bluetooth Signal Strength Sensor

Validation Enhancements

• Added error checks to prevent issues related to BLE incompatibilities.
• Show a warning when compiling with API encryption enabled.
• Display an info message when compiling without PSRAM.

Miscellaneous

• Updated the README to reflect these changes and additions.

[uriyacovy]

@AzonInc I installed it now, I'll update if I experience stability issues.

[AzonInc]

So no restarts within the week and event logs enabled?

Also were there any API disconnects or no issues at all as it happened in #66

[uriyacovy]

No restarts while event logs enabled. I didn't experience any API disconnects, but couldn't monitor for the whole week.

[AzonInc]

Okay cool.
I think it's a malformed message that's causing the api to disconnect.
Depends whats the name of the lock and also the users.