WIP: doc: tfm: Add documentation regarding configurable build

[SeppoTakalo]

Add documentation regarding CONFIG_TFM_PROFILE_TYPE_NOT_SET and various TF-M partitions that user need to configure.

NOTE: This is very early phase. This work is still in progress, but I'm just starting the review process very early.

[NordicBuilder]

CI Information

^{To view the history of this post, clich the 'edited' button above}
Build number: 7

Inputs:

Sources:

more details

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (0)

Outputs:

Toolchain

Version:
Build docker image:

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

• ❌ Toolchain
• ❌ Build twister
• ❌ Integration tests

Note: This message is automatically posted and updated by the CI

[NordicBuilder]

You can find the documentation preview for this PR at this link. It will be updated about 10 minutes after the documentation build succeeds.

Note: This comment is automatically posted by the Documentation Publish GitHub Action.