v1.0.0-preview16

What's Changed

• docs: Update README with some more detailed by @jtguggedal in #217
• modules: led: remove unnecesary complexity by @DematteisGiacomo in #216
• docs: Fix typo in readme by @jtguggedal in #218
• docs: Improve language in README by @jtguggedal in #220
• docs: Clean up in architecture docs by @jtguggedal in #221
• docs: Add customization and troubleshooting guides by @simensrostad in #219
• modules: cloud: Rename from cloud_module to cloud by @jtguggedal in #222
• docs: improve ci docs by @DematteisGiacomo in #224
• modules: led: gather global variables in a common struct by @DematteisGiacomo in #226
• manifest: Point to nrf-sdk v3.0.0 by @jorgenmk in #225
• boards: Thingy91, fixes by @jorgenmk in #227

Full Changelog: v1.0.0-preview15...v1.0.0-preview16