Merge branch 'feature/at_core' into 'release/v1.1.0.0'

feat(at_core): Update at core version f045c0c0

See merge request application/esp-at!157

Merge branch 'bugfix/tw23641' into 'release/v1.1.0.0'

bugfix/tw23641

See merge request application/esp-at!136

Merge branch 'feature/at_core' into 'release/v1.1.0.0'

feat(at_core): Update AT core version e83e1f46

See merge request application/esp-at!122

Merge branch 'feature/Add_key_for_CI' into 'master'


feat: Set CONFIG_AT_OTA_SSL_TOKEN_KEY in sdkconfig.defaults for CI

See merge request !76

Merge branch 'feature/modify_readme' into 'master'


feat: Add `make erase_flash` instruction in README.md to erase the entire flash

See merge request !28