Doc: Enhance the doc of scf_thr and scf_ene_thr

[sunliang98]

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• Have you added adequate unit tests and/or case tests for your pull request?
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Linked Issue

Fix #6454

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[Copilot]

Pull request overview

Updates the documentation for SCF convergence thresholds (scf_thr, scf_ene_thr) to clarify how SCF convergence is determined and to reduce confusion with the screen-reported EDIFF (referenced by Issue #6454).

Changes:

• Expanded scf_thr description to clarify interaction with scf_ene_thr for SCF convergence.
• Expanded scf_ene_thr description to clarify what energy difference is compared and how it differs from screen output EDIFF.
• Kept parameter docs consistent across C++ input help text, docs/parameters.yaml, and the rendered input manual.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
source/source_io/module_parameter/read_input_item_elec_stru.cpp	Updates in-program parameter descriptions for scf_thr/scf_ene_thr.
docs/parameters.yaml	Updates canonical parameter documentation entries for scf_thr/scf_ene_thr.
docs/advanced/input_files/input-main.md	Updates the user-facing INPUT manual text for scf_thr/scf_ene_thr.

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