Remove techstack.md file from the repository

[guibranco]

Description

• This PR deletes the techstack.md file, which contained information about the technologies used in the project.
• The removal of this file may impact documentation and references to the tech stack.

---

Changes walkthrough 📝

	Relevant files
Documentation	techstack.md Complete removal of techstack.md file                                        techstack.md Removed the entire techstack.md file. Eliminated all content related to the tech stack of the project. This file previously contained descriptions and images of technologies used. +0/-85

[penify-dev]

PR Review 🔍

⏱️ Estimated effort to review [1-5]	1, because the PR only involves the removal of a single file without any complex changes.
🧪 Relevant tests	No
⚡ Possible issues	Documentation Impact: The removal of the techstack.md file may lead to a lack of clarity regarding the technologies used in the project for new contributors or users.
🔒 Security concerns	No

[penify-dev]

PR Code Suggestions ✨

No code suggestions found for PR.

[AppVeyorBot]

❌ Build holiday-api-rust 1.0.221 failed (commit 45f256e40d by @guibranco)