feat(gitea): implement GetTaskURI for remote task resolution

[theakshaypant]

📝 Description of the Change

Enable Gitea/Forgejo provider to resolve remote taskRef URLs using the provider's authenticated API instead of returning "not supported". Supports branch, tag, and commit SHA URL formats.

🔗 Linked GitHub Issue

N/A

🧪 Testing Strategy

• Unit tests
• Integration tests
• End-to-end tests
• Manual testing
• Not Applicable

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[gemini-code-assist]

Code Review

This pull request implements the GetTaskURI method for the Gitea provider, enabling the retrieval of task files from Gitea and Forgejo URLs. It introduces a splitGiteaURL helper function to extract organization, repository, reference, and path information, supported by new unit tests. Review feedback highlights the need for more robust URL handling by using EscapedPath and PathUnescape to correctly process encoded characters like slashes and plus signs. Additionally, it is recommended to verify the Gitea client's initialization to prevent potential nil pointer panics.

[gemini-code-assist]

Using pURL.Path for splitting is problematic because it is already unescaped by url.Parse. If a path segment (such as a branch name or a directory) contains an encoded slash (%2F), pURL.Path will contain a literal /, causing strings.Split to break the segment incorrectly. Using pURL.EscapedPath() ensures you split only on the intended delimiters.

Suggested change

	uriPath := pURL.Path
	if pURL.RawPath != "" {
	uriPath = pURL.RawPath
	}
	uriPath := pURL.EscapedPath()

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 63.15789% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.48%. Comparing base (445941b) to head (070e110).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/provider/gitea/gitea.go	63.15%	14 Missing and 7 partials ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2732      +/-   ##
==========================================
+ Coverage   59.46%   59.48%   +0.01%     
==========================================
  Files         209      209              
  Lines       20702    20757      +55     
==========================================
+ Hits        12311    12347      +36     
- Misses       7616     7628      +12     
- Partials      775      782       +7     

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