Invalid characters for `$FOAM_TITLE` used in `.foam_template.filepath` fails silently

[redactedscribe]

Describe the bug

See title.

Small Reproducible Example

No response

Steps to Reproduce the Bug or Issue

1. Use $FOAM_TITLE as part of .foam_template.filepath's value.
2. Create note from template.
3. Title using invalid NTFS file system characters: Invalid "Characters"
4. File creation fails without any feedback as to why or what happened.

Expected behavior

Automatically strip invalid characters from the title and use that as the valid file name (as already happens when $FOAM_TITLE is outside of .foam_template.filepath). Of course, mentions of $FOAM_TITLE elsewhere should retain all the submitted characters.

Screenshots or Videos

No response

Operating System Version

Windows 11

Visual Studio Code Version

VSCodium 1.77.3

Additional context

This can be worked around by using filepath: "${FOAM_TITLE/[\/?*\"<>|:\\]/_/g}.md" to replace each of Windows' invalid characters with an underscore. This only works around the failure to create the file, however, if you now provide a title with or without an invalid character, another related bug is encountered at this point (duplication of text), see #1215.

Foam should probably handle these invalid characters instead of the user having to use VS Code variable transforms such as above.

[redactedscribe]

If you work around the failing file creation using the variable transform provided above, here is some of the duplication (as described in #1215) which can occur. I think the positions of the $-references worsen the problem. A simplified example:

This template...

---
foam_template:
  filepath: "$FOAM_DATE_YEAR-$FOAM_DATE_MONTH-$FOAM_DATE_DATE $FOAM_TITLE.md"
title: $1
---

# $FOAM_DATE_YEAR-$FOAM_DATE_MONTH-$FOAM_DATE_DATE ${1:$FOAM_TITLE}

Some text.

$1

...with title "My daily note" becomes the note:

---
title: My daily note daily note
---

# 2023-04-25 ${1:My daily note2023-04-25 ${1:-04-25 My daily note daily note

Some text.

My daily note daily note

As you can see, duplication happens even without invalid characters.

[riccardoferretti]

partially fixed in #1232