docs: Document the change in the default password and the debug mode

requested review from @zyga, @idlethread, @tony3oo3, @landgraf, @agherzan, @nawab, and @shettygururaj

assigned to @mrybczyn

As someone who has spent some time figuring out exactly what username and password to use in random images, I think being extremely explicit and using the right formatting is exactly what we should do to document the default username and password in our images.

resolved all threads

added 3 commits

• 231d8bb2 - docs: Document the change in the default password
• 3a8a672c - docs: Capitalize title in Supported Images
• 4c306326 - docs: add Debug Mode documentation

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added 20 commits

• 4c306326...85c0c66b - 17 commits from branch eclipse/oniro-core:kirkstone
• 98791073 - docs: Document the change in the default password
• 2584fbd8 - docs: Capitalize title in Supported Images
• 71151c01 - docs: add Debug Mode documentation

Compare with previous version

@mrybczyn this needs some tweaks:

Warning, treated as error:
/builds/eclipse/oniro-core/oniro/docs/debug-mode.rst:10:Undefined substitution referenced: "main_project_name".

added 12 commits

• 71151c01...ea9ea45d - 9 commits from branch eclipse/oniro-core:kirkstone
• f3386f58 - docs: Document the change in the default password
• c4ea4b6e - docs: Capitalize title in Supported Images
• 381ff87f - docs: add Debug Mode documentation

Compare with previous version