fix: resolve broken external links and missing target handling in learning resources (#245)

[mithilP007]

This PR resolves #245 by introducing a robust link helper utility to safely parse and standardize external link handling, registering a custom Jinja filter 'parse_resource' to handle formatting, and updating 'templates/project.html' to render resource links with appropriate target and rel attributes. Additionally, unit tests were added to verify the helper logic.

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Pull request overview

This PR standardizes how project learning-resource links are parsed and rendered so external resources open safely in a new tab with appropriate security attributes.

Changes:

• Added a reusable parse_external_link helper for extracting labels and URLs.
• Registered a parse_resource Jinja filter through the main routes blueprint.
• Updated the project detail template and added helper unit tests.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
utils/link_helper.py	Adds link parsing utility for resource strings.
routes/main_routes.py	Registers the helper as a Jinja template filter.
templates/project.html	Uses parsed link metadata to render resource links safely.
tests/test_basic.py	Adds unit coverage for the new link helper.

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[mithilP007]

Solved under Gssoc2026
you can checkout the change