Migrate server specific skills into correct location

[theMickster]

🎟️ Tracking

PM-35296

📔 Objective

Migrate the server specific skills out of the bitwarden-software-engineer.
Each skill was copy + paste migrated.
Each skill has a minor alteration to the description frontmatter to enhance with a stronger Use when sentence.
The writing-server-code skill no longer has a Repository Orientation section because that's incorrect for a skill to contain.

[github-actions]

Bitwarden Claude Code Review

Overall Assessment: APPROVE

This PR migrates four server-specific Claude skills (implementing-dapper-queries, implementing-ef-core, writing-database-queries, writing-server-code) from the bitwarden-software-engineer plugin into the server repo's .claude/skills/ directory. The changes are documentation-only Markdown files containing development guidance for AI assistants. No source code, dependencies, or infrastructure files are affected.

No findings were identified.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Checkmarx One – Scan Summary & Details – fcee3ffe-613f-47c7-b49d-70f5d33e1400

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.98%. Comparing base (bb5506e) to head (556ef61).
⚠️ Report is 25 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7488   +/-   ##
=======================================
  Coverage   58.98%   58.98%           
=======================================
  Files        2076     2076           
  Lines       91441    91441           
  Branches     8130     8130           
=======================================
+ Hits        53937    53938    +1     
+ Misses      35581    35580    -1     
  Partials     1923     1923           

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[SaintPatrck]

Looks good. Couple of non-blocking questions.

🌱 I know the purpose of this PR is to migrate Skills from our marketplace, but are allowed-tools going to be updated in a follow-up PR?

[SaintPatrck]

❓ Should WebFetch be added to allowed-tools so these links can be followed when needed?

Same question for the other Skills that have these links as additional references.

[theMickster]

Let's chat about it. I don't think I want to have it in there just yet, but, instead, have another heading called ## Sources that is used by Claude during skill development/refinement/improvement to validate that the information found in the skill still matches the information in Contributing Docs.

I am working on this locally with my local user-level CLAUDE.md files. I'll let you know when/if that's ready for a primetime promotion.