Map logical /dev/console fds to the primary sink fd for select.
This avoids probing UART1/UART2 for stdout/stderr and keeps UART select state consistent.
Add stdio regression checks for logical fd mapping and symmetric uart_end_select teardown.
- Move the linux repl chip and deprecate chip related functions
- Update location of driver specific default config
- Add missing comments on the newly added functions in the affected components.
esp_stdio contains everything the old esp_vfs_console contained (the vfs stdio glue layer)
as well as other functionality related to stdio (previously referred to as console)
