[Feature]: load sources for active targets only

[aelam]

Problem Statement

currently, all sources are loaded for targets. which would be a performance issue for huge projects.

AS IS

1. client open project --> lsp: buildTarget --> bsp : load all targets
2. lsp buildTarget/sources --> bsp: load all sources for each target

TO BE

1. client open project --> lsp: buildTarget --> bsp : load all targets
2. lsp buildTarget/sources --> bsp: don't load sources each target
3. client: open a file --> lsp: textDidOpen --> bsp: start to load sources for the active target

Proposed Solution

AS IS

1. client open project --> lsp: buildTarget --> bsp : load all targets
2. lsp buildTarget/sources --> bsp: load all sources for each target

TO BE

1. client open project --> lsp: buildTarget --> bsp : load all targets
2. lsp buildTarget/sources --> bsp: don't load sources each target
3. client: open a file --> lsp: textDidOpen --> bsp: start to load sources for the active target

Alternatives Considered

No response

Priority

Low - Nice to have

Implementation

• I'm willing to submit a PR for this feature
• I would need guidance on how to implement this
• I can help with testing

Additional Context

No response