Replace hardcoded entity type names with synonym placeholders in English and German translations

[Copilot]

• Fix English placeholders: Replace {type} with [Type] and {{type}} with [[Type]] (capitalized first letter)
• Add German translation placeholders for edit/new patterns
• Add German translation placeholders for tree navigation labels
• Add German translation placeholders for statistics patterns
• Fix awkward placeholder concatenation in German translation
• Use capitalized placeholders in German (nouns are always capitalized in German)
• Capitalize placeholders at the beginning of sentences/titles in English

Placeholder Syntax (corrected)

• [Type] → Singular capitalized (e.g., "Category")
• [[Type]] → Plural capitalized (e.g., "Categories")
• [type] → Singular lowercase (e.g., "category")
• [[type]] → Plural lowercase (e.g., "categories")

Words at the beginning of sentences use capitalized placeholders (e.g., [[Part]] with [category]).

Original prompt

Replace the mentions of footprint, category, parts, etc. in english translations through their synonym placeholder version.

So if you have defined a translation like "Create new [category]" it will become "Create new category" if you have no synonym defined, and "Create new my synonym" if there is a custom type synonym defined.

The type values can be found inside the ElementTypes enum. For every type there are 4 placeholders/versions defined:

{category}: Singular with capital letter (e.g. "Category")
{{category}}: Plural with capital letter (e.g. "Categories")
[category]: Singular lowercase (e.g. "category")
[[category]]: Plural lowercase (e.g. "categories")

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[jbtronics]

@copilot

We now have placeholders where
[Type] → Singular capitalized (e.g., "Category")
[[Type]] → Plural capitalized (e.g., "Categories")
[type] → Singular lowercase (e.g., "category")
[[type]] → Plural lowercase (e.g., "categories")

So the bracket type is not the difference but the capitalliztion of the first letter.

Also do that for german translatation too.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.33%. Comparing base (a356eec) to head (d894e16).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1128      +/-   ##
============================================
- Coverage     58.34%   58.33%   -0.02%     
  Complexity     7286     7286              
============================================
  Files           580      580              
  Lines         23193    23193              
============================================
- Hits          13533    13530       -3     
- Misses         9660     9663       +3     

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[Copilot]

@copilot

We now have placeholders where
...

Fixed the placeholder syntax to use [Type]/[[Type]] (with capitalized first letter inside brackets) instead of {type}/{{type}}. Also applied the same changes to the German translations (messages.de.xlf). Changes committed in df8df14.

[jbtronics]

@copilot in German, nouns are written capitalized

[Copilot]

@copilot in German, nouns are written capitalized

Updated all German translations to use capitalized placeholders ([Category], [[Part]], etc.) since nouns are always capitalized in German. Fixed in f4b4ed1.

[jbtronics]

@copilot Words at the beginning of get written capitalized

[Copilot]

@copilot Words at the beginning of get written capitalized

Updated English translations to use capitalized placeholders at the beginning of sentences/titles (e.g., [[Part]] with [category] instead of [[part]] with [category]). Fixed in e60033a.