Hex2image (ESPTOOL-817)

[LeZerb]

This change adds the possibility to convert a hex file to an image file with make_image. It also allows to create images for other targets then ESP8266.

I have tested this change with the following hardware & software combinations:

Windows 11, ESP32C3 SuperMini

I have run the esptool.py automated integration tests with this change and the above hardware:

NO TESTING

[github-actions]

Warnings

⚠️

Some issues found for the commit messages in this PR: the commit message "support hex input in make_image": summary looks empty type/action looks empty Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 20 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).

👋 Hello LeZerb, we appreciate your contribution to this project!

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[dobairoland]

See #959 (comment)