[modem]: Use pre-generated command declarations to improve IDE navigation

[david-cermak]

Use generated AT command definitions for IDE navigation

• Simplifies AT macro definitions
• Replaces variadic template C++ perfect forwarding with macro based delegation
• Used pre-generated commands by default
• Option to use in-place macro evaluation (for esp_modem developers)

Task list

• Add CI check to test consistency
• Update docs generation
• Make config option (for esp-modem developers) to use in-place generic headers
• Add docs to the generation scripts **/generate/*.inc and to the documentation
  (split the commands into groups -- maybe in a separate PR)

How to review this PR

• Review changes in components CMakeLists.txt and Kconfig (for adding two options useful for "component developer" vs "component user")
• Review *.inc files -- primary sources of AT command APIs and helper macros
• Review **/generate/*.(hpp|cpp) -- generic (templates) of using the AT command prototypes and implemenations
• Briefly review **/command/*.(hpp|cpp) -- generated output, used in "component user" mode
• Review generation scripts, github actions

[github-advanced-security]

clang-tidy found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

[david-cermak]

• bump to v2.0.0 after this change (might break someones customization)
• invite public contributors to review this change

[david-cermak]

@diplfranzhoepfinger PTAL, too.

[diplfranzhoepfinger]

@diplfranzhoepfinger PTAL, too.

Yes. IDE Navigation in Espressif IDE is a nightmare in esp-modem.
I will have a look to this.

Thanks